USB Enable Selective Suspend

<#
Fix-FTDI-FullFlow-Patched.ps1
- Create Device Parameters if missing, write PortName if missing (from FriendlyName or WMI), and set selective-suspend values only if missing.
- Does NOT change COM assignments.
- Logs to Desktop and rescans/devices + schedules reboot if changes occurred.
Run as Administrator.
#> param( [switch]$WhatIf, # dry run: show actions, do not write or reboot [switch]$NoReboot # suppress scheduling a reboot even if changes were made) # Verify elevation
if (-not ([Security.Principal.WindowsPrincipal] [Security.Principal.WindowsIdentity]::GetCurrent.IsInRole([Security.Principal.WindowsBuiltinRole]::Administrator) { Write-Error "Script must be run elevated (Run as Administrator). Exiting." exit 1
} $timestamp = (Get-Date).ToString('yyyyMMdd_HHmmss')
$logFile = Join-Path $env:USERPROFILE ("Desktop\FTDI_FullFlow_$timestamp.log")
"Started: $(Get-Date -Format u)" | Out-File -FilePath $logFile -Encoding UTF8 # Helper: detect COM for PnP instance via Win32_SerialPort
function Get-ComForInstance { param([string]$instanceId) try { $sp = Get-CimInstance -ClassName Win32_SerialPort -ErrorAction SilentlyContinue | Where-Object { $_.PNPDeviceID -eq $instanceId } if ($sp) { return $sp.DeviceID } # e.g. "COM4" # Tail match fallback $tail = ($instanceId -split '\\')[-1] if ($tail) { $sp = Get-CimInstance -ClassName Win32_SerialPort -ErrorAction SilentlyContinue | Where-Object { $_.PNPDeviceID -like "*$tail*" } if ($sp) { return $sp.DeviceID } } } catch { # ignore } return $null
} # Find FTDI COM ports
$ports = Get-PnpDevice -Class Ports -PresentOnly -ErrorAction SilentlyContinue | Where-Object { ($_.Manufacturer -and $_.Manufacturer -like '*FTDI*') -or ($_.InstanceId -and $_.InstanceId -match 'VID_0403') } if (-not $ports -or $ports.Count -eq 0) { "No FTDI COM ports found." | Tee-Object -FilePath $logFile -Append Write-Output "No FTDI COM ports found. See log: $logFile" exit 0
} "Found $($ports.Count) FTDI COM port(s)." | Tee-Object -FilePath $logFile -Append $createdCount = 0
$errors = @ # Pre-cache Enum base for search
$enumBase = 'HKLM:\SYSTEM\CurrentControlSet\Enum' foreach ($p in $ports) { "----" | Tee-Object -FilePath $logFile -Append "Device FriendlyName: $($p.FriendlyName)" | Tee-Object -FilePath $logFile -Append "InstanceId: $($p.InstanceId)" | Tee-Object -FilePath $logFile -Append $inst = $p.InstanceId if ([string]::IsNullOrWhiteSpace($inst) { "InstanceId empty; skipping" | Tee-Object -FilePath $logFile -Append continue } # Find matching Enum node(s) first (more robust than direct string build) $dpCandidates = @ try { $tail = ($inst -split '\\')[-1] # search for nodes that match the instance or the tail (case-insensitive) $matches = Get-ChildItem -Path $enumBase -Recurse -ErrorAction SilentlyContinue | Where-Object { $_.PSPath -match [regex]::Escape($inst) -or ($tail -and ($_.PSPath -match [regex]::Escape($tail) } foreach ($m in $matches) { $nodePath = $m.PSPath # ensure nodePath is a single string $nodePathStr = [string]$nodePath $dpCandidates += Join-Path $nodePathStr 'Device Parameters' $dpCandidates += Join-Path (Join-Path $nodePathStr '0000') 'Device Parameters' } } catch { # ignore search errors, we'll fallback to constructed path } # Fallback: construct the expected path if search didn't find nodes if ($dpCandidates.Count -eq 0) { $parts = $inst -split '\\' $subpath = [string]($parts -join '\') $regPathBase = Join-Path $enumBase $subpath $regPathBase = [string]$regPathBase $dpCandidates += Join-Path $regPathBase 'Device Parameters' $dpCandidates += Join-Path (Join-Path $regPathBase '0000') 'Device Parameters' } $dpFound = $false foreach ($dp in $dpCandidates) { "Checking: $dp" | Tee-Object -FilePath $logFile -Append if (Test-Path $dp) { $dpFound = $true "Using Device Parameters: $dp" | Tee-Object -FilePath $logFile -Append # 1) PortName: write only if missing try { $portVal = $null try { $portVal = (Get-ItemProperty -Path $dp -Name 'PortName' -ErrorAction SilentlyContinue).PortName } catch { $portVal = $null } if ([string]::IsNullOrWhiteSpace($portVal) { # Try FriendlyName first (e.g. "USB Serial Port (COM4)") $friendly = $p.FriendlyName $detectedCom = $null if ($friendly -and ($friendly -match '\(COM(\d+)\)') { $detectedCom = "COM$($matches[1])" "Detected COM from FriendlyName: $detectedCom" | Tee-Object -FilePath $logFile -Append } else { # fallback: WMI lookup $detectedCom = Get-ComForInstance -instanceId $inst if ($detectedCom) { "Detected COM via WMI: $detectedCom" | Tee-Object -FilePath $logFile -Append } } if ($detectedCom) { if ($WhatIf) { "WhatIf: would write PortName = $detectedCom at $($dp)" | Tee-Object -FilePath $logFile -Append $createdCount++ } else { try { New-Item -Path $dp -Force | Out-Null New-ItemProperty -Path $dp -Name 'PortName' -PropertyType String -Value $detectedCom -Force -ErrorAction Stop | Out-Null "WROTE PortName = $detectedCom at $($dp)" | Tee-Object -FilePath $logFile -Append $createdCount++ } catch { "ERROR writing PortName at $($dp) : $($_.Exception.Message)" | Tee-Object -FilePath $logFile -Append $errors += "PortName write error for $inst : $($_.Exception.Message)" } } } else { "Could not detect COM for $inst; PortName not written." | Tee-Object -FilePath $logFile -Append } } else { "PortName already exists at $($dp): $portVal (no change)" | Tee-Object -FilePath $logFile -Append } } catch { "Error reading/writing PortName at $($dp): $($_.Exception.Message)" | Tee-Object -FilePath $logFile -Append $errors += "PortName error for $inst : $($_.Exception.Message)" } # 2) Ensure selective-suspend properties exist (create only if missing) $props = @{ DeviceIdleEnabled=0; DefaultIdleState=0; UserSetDeviceIdleEnabled=0; SSIdleTimeout=0 } foreach ($kv in $props.GetEnumerator { $name = $kv.Key; $val = $kv.Value try { $exists = (Get-ItemProperty -Path $dp -Name $name -ErrorAction SilentlyContinue) -ne $null } catch { $exists = $false } if ($exists) { "$name already present at $($dp) - skipping" | Tee-Object -FilePath $logFile -Append } else { if ($WhatIf) { "WhatIf: would create $name = $val at $($dp)" | Tee-Object -FilePath $logFile -Append $createdCount++ } else { try { New-Item -Path $dp -Force | Out-Null New-ItemProperty -Path $dp -Name $name -PropertyType DWord -Value $val -Force -ErrorAction Stop | Out-Null "Created $name = $val at $($dp)" | Tee-Object -FilePath $logFile -Append $createdCount++ } catch { "ERROR creating $name at $($dp) : $($_.Exception.Message)" | Tee-Object -FilePath $logFile -Append $errors += "Create $name error for $inst : $($_.Exception.Message)" } } } } break } else { "Not found: $($dp)" | Tee-Object -FilePath $logFile -Append } } # foreach candidate if (-not $dpFound) { # Create primary Device Parameters and repeat actions $dp = Join-Path $regPathBase 'Device Parameters' "Device Parameters not found - creating $($dp)" | Tee-Object -FilePath $logFile -Append if ($WhatIf) { "WhatIf: would create key $($dp) and attempt writes" | Tee-Object -FilePath $logFile -Append $createdCount++ } else { try { New-Item -Path $dp -Force | Out-Null "Created key $($dp)" | Tee-Object -FilePath $logFile -Append } catch { "ERROR creating key $($dp) : $($_.Exception.Message)" | Tee-Object -FilePath $logFile -Append $errors += "Create key error for $inst : $($_.Exception.Message)" continue } # Attempt PortName detection/writes as above $detectedCom = $null $friendly = $p.FriendlyName if ($friendly -and ($friendly -match '\(COM(\d+)\)') { $detectedCom = "COM$($matches[1])" } if (-not $detectedCom) { $detectedCom = Get-ComForInstance -instanceId $inst } if ($detectedCom) { try { New-ItemProperty -Path $dp -Name 'PortName' -PropertyType String -Value $detectedCom -Force -ErrorAction Stop | Out-Null "WROTE PortName = $detectedCom at $($dp)" | Tee-Object -FilePath $logFile -Append $createdCount++ } catch { "ERROR writing PortName at $($dp) : $($_.Exception.Message)" | Tee-Object -FilePath $logFile -Append $errors += "PortName write error for $inst : $($_.Exception.Message)" } } else { "Could not detect COM for $inst after creating key." | Tee-Object -FilePath $logFile -Append } # create selective-suspend props foreach ($kv in @{ DeviceIdleEnabled=0; DefaultIdleState=0; UserSetDeviceIdleEnabled=0; SSIdleTimeout=0 }.GetEnumerator { try { New-ItemProperty -Path $dp -Name $kv.Key -PropertyType DWord -Value $kv.Value -Force -ErrorAction Stop | Out-Null "Created $($kv.Key) = $($kv.Value) at $($dp)" | Tee-Object -FilePath $logFile -Append $createdCount++ } catch { "ERROR creating $($kv.Key) at $($dp) : $($_.Exception.Message)" | Tee-Object -FilePath $logFile -Append $errors += "Create prop error $($kv.Key) for $inst : $($_.Exception.Message)" } } } }
} # foreach port "Created/changed count: $createdCount" | Tee-Object -FilePath $logFile -Append
if ($errors.Count -gt 0) { "Errors: $($errors.Count)" | Tee-Object -FilePath $logFile -Append; $errors | Tee-Object -FilePath $logFile -Append } # Rescan devices (pnputil /scan-devices) and schedule reboot if changes were made
try { Write-Output "Running device rescan: pnputil /scan-devices" | Tee-Object -FilePath $logFile -Append Start-Process -FilePath 'pnputil.exe' -ArgumentList '/scan-devices' -NoNewWindow -Wait
} catch { "pnputil failed: $($_.Exception.Message)" | Tee-Object -FilePath $logFile -Append
} if (($createdCount -gt 0) -and (-not $WhatIf) -and (-not $NoReboot) { "Scheduling reboot in 15 seconds so changes take effect (abort with 'shutdown /a')." | Tee-Object -FilePath $logFile -Append Start-Process -FilePath 'shutdown.exe' -ArgumentList @('/r','/t','15','/c','Applying FTDI Device Parameter changes') -NoNewWindow
} else { "No reboot scheduled. If you created properties and want immediate recognition, run: pnputil /scan-devices or reboot manually." | Tee-Object -FilePath $logFile -Append
} "Completed: $(Get-Date -Format u)" | Tee-Object -FilePath $logFile -Append
Write-Output "Done. Log saved to: $logFile"

<#
Disable-FTDI-SelectiveSuspend-ApplyIfMissing-WithPortName.ps1
- Creates Device Parameters if missing, writes PortName (from FriendlyName or WMI) if missing, and creates selective-suspend values only if missing.
- Does NOT change actual COM assignment.
- Logs to Desktop and rescans devices; schedules a 15s reboot if changes were made (abort with shutdown /a).
Run as Administrator. Use -WhatIf to dry-run.
#> param( [switch]$WhatIf, [switch]$NoReboot) # require elevation
if (-not ([Security.Principal.WindowsPrincipal] [Security.Principal.WindowsIdentity]::GetCurrent.IsInRole([Security.Principal.WindowsBuiltinRole]::Administrator) { Write-Error "Run this script elevated (Run as Administrator). Exiting." exit 1
} $timestamp = (Get-Date).ToString('yyyyMMdd_HHmmss')
$logFile = Join-Path $env:USERPROFILE ("Desktop\FTDI_ApplyIfMissing_WithPortName_$timestamp.log")
"Started: $(Get-Date -Format u)" | Out-File -FilePath $logFile -Encoding UTF8 function Get-ComForInstance { param([string]$instanceId) try { $sp = Get-CimInstance -ClassName Win32_SerialPort -ErrorAction SilentlyContinue | Where-Object { $_.PNPDeviceID -eq $instanceId } if ($sp) { return $sp.DeviceID } $tail = ($instanceId -split '\\')[-1] if ($tail) { $sp = Get-CimInstance -ClassName Win32_SerialPort -ErrorAction SilentlyContinue | Where-Object { $_.PNPDeviceID -like "*$tail*" } if ($sp) { return $sp.DeviceID } } } catch { } return $null
} # Find FTDI ports
$ports = Get-PnpDevice -Class Ports -PresentOnly -ErrorAction SilentlyContinue | Where-Object { ($_.Manufacturer -and $_.Manufacturer -like '*FTDI*') -or ($_.InstanceId -and $_.InstanceId -match 'VID_0403') } if (-not $ports -or $ports.Count -eq 0) { "No FTDI COM ports found." | Tee-Object -FilePath $logFile -Append Write-Output "No FTDI COM ports found. See log: $logFile" exit 0
} "Found $($ports.Count) FTDI COM port(s)." | Tee-Object -FilePath $logFile -Append $createdCount = 0
$errors = @
$enumBase = 'HKLM:\SYSTEM\CurrentControlSet\Enum' foreach ($p in $ports) { "----" | Tee-Object -FilePath $logFile -Append "Device FriendlyName: $($p.FriendlyName)" | Tee-Object -FilePath $logFile -Append "InstanceId: $($p.InstanceId)" | Tee-Object -FilePath $logFile -Append $inst = $p.InstanceId if ([string]::IsNullOrWhiteSpace($inst) { "InstanceId empty; skipping" | Tee-Object -FilePath $logFile -Append continue } # Build candidate Device Parameters paths (search Enum first to avoid array/join issues) $dpCandidates = @ try { $tail = ($inst -split '\\')[-1] $matches = Get-ChildItem -Path $enumBase -Recurse -ErrorAction SilentlyContinue | Where-Object { $_.PSPath -match [regex]::Escape($inst) -or ($tail -and ($_.PSPath -match [regex]::Escape($tail) } foreach ($m in $matches) { $node = [string]$m.PSPath $dpCandidates += Join-Path $node 'Device Parameters' $dpCandidates += Join-Path (Join-Path $node '0000') 'Device Parameters' } } catch { # fallback handled below } if ($dpCandidates.Count -eq 0) { $parts = $inst -split '\\' $subpath = [string]($parts -join '\') $regPathBase = Join-Path $enumBase $subpath $regPathBase = [string]$regPathBase $dpCandidates += Join-Path $regPathBase 'Device Parameters' $dpCandidates += Join-Path (Join-Path $regPathBase '0000') 'Device Parameters' } $dpFound = $false foreach ($dp in $dpCandidates) { "Checking: $dp" | Tee-Object -FilePath $logFile -Append if (Test-Path $dp) { $dpFound = $true "Using Device Parameters: $dp" | Tee-Object -FilePath $logFile -Append # PortName - create only if missing try { $portVal = $null try { $portVal = (Get-ItemProperty -Path $dp -Name 'PortName' -ErrorAction SilentlyContinue).PortName } catch { $portVal = $null } if ([string]::IsNullOrWhiteSpace($portVal) { $friendly = $p.FriendlyName $detectedCom = $null if ($friendly -and ($friendly -match '\(COM(\d+)\)') { $detectedCom = "COM$($matches[1])" "Detected COM from FriendlyName: $detectedCom" | Tee-Object -FilePath $logFile -Append } else { $detectedCom = Get-ComForInstance -instanceId $inst if ($detectedCom) { "Detected COM via WMI: $detectedCom" | Tee-Object -FilePath $logFile -Append } } if ($detectedCom) { if ($WhatIf) { "WhatIf: would write PortName = $detectedCom at $dp" | Tee-Object -FilePath $logFile -Append $createdCount++ } else { try { New-Item -Path $dp -Force | Out-Null New-ItemProperty -Path $dp -Name 'PortName' -PropertyType String -Value $detectedCom -Force -ErrorAction Stop | Out-Null "WROTE PortName = $detectedCom at $dp" | Tee-Object -FilePath $logFile -Append $createdCount++ } catch { "ERROR writing PortName at $dp : $($_.Exception.Message)" | Tee-Object -FilePath $logFile -Append $errors += "PortName write error for $inst : $($_.Exception.Message)" } } } else { "Could not detect COM for $inst; PortName not written." | Tee-Object -FilePath $logFile -Append } } else { "PortName already exists at $dp: $portVal (no change)" | Tee-Object -FilePath $logFile -Append } } catch { "Error reading/writing PortName at $dp: $($_.Exception.Message)" | Tee-Object -FilePath $logFile -Append $errors += "PortName error for $inst : $($_.Exception.Message)" } # selective-suspend props (create only if missing) $props = @{ DeviceIdleEnabled=0; DefaultIdleState=0; UserSetDeviceIdleEnabled=0; SSIdleTimeout=0 } foreach ($kv in $props.GetEnumerator { $name = $kv.Key; $val = $kv.Value try { $exists = (Get-ItemProperty -Path $dp -Name $name -ErrorAction SilentlyContinue) -ne $null } catch { $exists = $false } if ($exists) { "$name already present at $dp - skipping" | Tee-Object -FilePath $logFile -Append } else { if ($WhatIf) { "WhatIf: would create $name = $val at $dp" | Tee-Object -FilePath $logFile -Append $createdCount++ } else { try { New-Item -Path $dp -Force | Out-Null New-ItemProperty -Path $dp -Name $name -PropertyType DWord -Value $val -Force -ErrorAction Stop | Out-Null "Created $name = $val at $dp" | Tee-Object -FilePath $logFile -Append $createdCount++ } catch { "ERROR creating $name at $dp : $($_.Exception.Message)" | Tee-Object -FilePath $logFile -Append $errors += "Create $name error for $inst : $($_.Exception.Message)" } } } } break } else { "Not found: $dp" | Tee-Object -FilePath $logFile -Append } } # end foreach dpCandidates if (-not $dpFound) { # Create primary Device Parameters and repeat actions $parts = $inst -split '\\' $subpath = [string]($parts -join '\') $regPathBase = Join-Path $enumBase $subpath $dp = Join-Path $regPathBase 'Device Parameters' "Device Parameters not found - creating $dp" | Tee-Object -FilePath $logFile -Append if ($WhatIf) { "WhatIf: would create key $dp and attempt writes" | Tee-Object -FilePath $logFile -Append $createdCount++ } else { try { New-Item -Path $dp -Force | Out-Null "Created key $dp" | Tee-Object -FilePath $logFile -Append } catch { "ERROR creating key $dp : $($_.Exception.Message)" | Tee-Object -FilePath $logFile -Append $errors += "Create key error for $inst : $($_.Exception.Message)" continue } # PortName detection and writes $detectedCom = $null $friendly = $p.FriendlyName if ($friendly -and ($friendly -match '\(COM(\d+)\)') { $detectedCom = "COM$($matches[1])" } if (-not $detectedCom) { $detectedCom = Get-ComForInstance -instanceId $inst } if ($detectedCom) { try { New-ItemProperty -Path $dp -Name 'PortName' -PropertyType String -Value $detectedCom -Force -ErrorAction Stop | Out-Null "WROTE PortName = $detectedCom at $dp" | Tee-Object -FilePath $logFile -Append $createdCount++ } catch { "ERROR writing PortName at $dp : $($_.Exception.Message)" | Tee-Object -FilePath $logFile -Append $errors += "PortName write error for $inst : $($_.Exception.Message)" } } else { "Could not detect COM for $inst after creating key." | Tee-Object -FilePath $logFile -Append } # create selective-suspend props foreach ($kv in @{ DeviceIdleEnabled=0; DefaultIdleState=0; UserSetDeviceIdleEnabled=0; SSIdleTimeout=0 }.GetEnumerator { try { New-ItemProperty -Path $dp -Name $kv.Key -PropertyType DWord -Value $kv.Value -Force -ErrorAction Stop | Out-Null "Created $($kv.Key) = $($kv.Value) at $dp" | Tee-Object -FilePath $logFile -Append $createdCount++ } catch { "ERROR creating $($kv.Key) at $dp : $($_.Exception.Message)" | Tee-Object -FilePath $logFile -Append $errors += "Create prop error $($kv.Key) for $inst : $($_.Exception.Message)" } } } } } # end foreach ports "Created/changed count: $createdCount" | Tee-Object -FilePath $logFile -Append
if ($errors.Count -gt 0) { "Errors: $($errors.Count)" | Tee-Object -FilePath $logFile -Append; $errors | Tee-Object -FilePath $logFile -Append } # Rescan devices
try { "Running device rescan: pnputil /scan-devices" | Tee-Object -FilePath $logFile -Append Start-Process -FilePath 'pnputil.exe' -ArgumentList '/scan-devices' -NoNewWindow -Wait
} catch { "pnputil failed: $($_.Exception.Message)" | Tee-Object -FilePath $logFile -Append
} if (($createdCount -gt 0) -and (-not $WhatIf) -and (-not $NoReboot) { "Scheduling reboot in 15 seconds so changes take effect (abort with 'shutdown /a')." | Tee-Object -FilePath $logFile -Append Start-Process -FilePath 'shutdown.exe' -ArgumentList @('/r','/t','15','/c','Applying FTDI Device Parameter changes') -NoNewWindow
} else { "No reboot scheduled. If you created properties and want immediate recognition, run: pnputil /scan-devices or reboot manually." | Tee-Object -FilePath $logFile -Append
} "Completed: $(Get-Date -Format u)" | Tee-Object -FilePath $logFile -Append
Write-Output "Done. Log saved to: $logFile"

<#
Disable-FTDI-SelectiveSuspend-ApplyIfMissing-WithPortName.ps1
- Creates Device Parameters if missing, writes PortName (from FriendlyName or WMI) if missing, and creates selective-suspend values only if missing.
- Does NOT change actual COM assignment.
- Logs to Desktop and rescans devices; schedules a 15s reboot if changes were made (abort with shutdown /a).
Run as Administrator. Use -WhatIf to dry-run.
#> param( [switch]$WhatIf, [switch]$NoReboot) # require elevation
if (-not ([Security.Principal.WindowsPrincipal] [Security.Principal.WindowsIdentity]::GetCurrent.IsInRole([Security.Principal.WindowsBuiltinRole]::Administrator) { Write-Error "Run this script elevated (Run as Administrator). Exiting." exit 1
} $timestamp = (Get-Date).ToString('yyyyMMdd_HHmmss')
$logFile = Join-Path $env:USERPROFILE ("Desktop\FTDI_ApplyIfMissing_WithPortName_$timestamp.log")
"Started: $(Get-Date -Format u)" | Out-File -FilePath $logFile -Encoding UTF8 function Get-ComForInstance { param([string]$instanceId) try { $sp = Get-CimInstance -ClassName Win32_SerialPort -ErrorAction SilentlyContinue | Where-Object { $_.PNPDeviceID -eq $instanceId } if ($sp) { return $sp.DeviceID } $tail = ($instanceId -split '\\')[-1] if ($tail) { $sp = Get-CimInstance -ClassName Win32_SerialPort -ErrorAction SilentlyContinue | Where-Object { $_.PNPDeviceID -like "*$tail*" } if ($sp) { return $sp.DeviceID } } } catch { } return $null
} # Find FTDI ports
$ports = Get-PnpDevice -Class Ports -PresentOnly -ErrorAction SilentlyContinue | Where-Object { ($_.Manufacturer -and $_.Manufacturer -like '*FTDI*') -or ($_.InstanceId -and $_.InstanceId -match 'VID_0403') } if (-not $ports -or $ports.Count -eq 0) { "No FTDI COM ports found." | Tee-Object -FilePath $logFile -Append Write-Output "No FTDI COM ports found. See log: $logFile" exit 0
} "Found $($ports.Count) FTDI COM port(s)." | Tee-Object -FilePath $logFile -Append $createdCount = 0
$errors = @
$enumBase = 'HKLM:\SYSTEM\CurrentControlSet\Enum' foreach ($p in $ports) { "----" | Tee-Object -FilePath $logFile -Append "Device FriendlyName: $($p.FriendlyName)" | Tee-Object -FilePath $logFile -Append "InstanceId: $($p.InstanceId)" | Tee-Object -FilePath $logFile -Append $inst = $p.InstanceId if ([string]::IsNullOrWhiteSpace($inst) { "InstanceId empty; skipping" | Tee-Object -FilePath $logFile -Append continue } # Build candidate Device Parameters paths (search Enum first to avoid array/join issues) $dpCandidates = @ try { $tail = ($inst -split '\\')[-1] $matches = Get-ChildItem -Path $enumBase -Recurse -ErrorAction SilentlyContinue | Where-Object { $_.PSPath -match [regex]::Escape($inst) -or ($tail -and ($_.PSPath -match [regex]::Escape($tail) } foreach ($m in $matches) { $node = [string]$m.PSPath $dpCandidates += Join-Path $node 'Device Parameters' $dpCandidates += Join-Path (Join-Path $node '0000') 'Device Parameters' } } catch { # fallback handled below } if ($dpCandidates.Count -eq 0) { $parts = $inst -split '\\' $subpath = [string]($parts -join '\') $regPathBase = Join-Path $enumBase $subpath $regPathBase = [string]$regPathBase $dpCandidates += Join-Path $regPathBase 'Device Parameters' $dpCandidates += Join-Path (Join-Path $regPathBase '0000') 'Device Parameters' } $dpFound = $false foreach ($dp in $dpCandidates) { "Checking: $dp" | Tee-Object -FilePath $logFile -Append if (Test-Path $dp) { $dpFound = $true "Using Device Parameters: $($dp)" | Tee-Object -FilePath $logFile -Append # PortName - create only if missing try { $portVal = $null try { $portVal = (Get-ItemProperty -Path $dp -Name 'PortName' -ErrorAction SilentlyContinue).PortName } catch { $portVal = $null } if ([string]::IsNullOrWhiteSpace($portVal) { $friendly = $p.FriendlyName $detectedCom = $null if ($friendly -and ($friendly -match '\(COM(\d+)\)') { $detectedCom = "COM$($matches[1])" "Detected COM from FriendlyName: $($detectedCom)" | Tee-Object -FilePath $logFile -Append } else { $detectedCom = Get-ComForInstance -instanceId $inst if ($detectedCom) { "Detected COM via WMI: $($detectedCom)" | Tee-Object -FilePath $logFile -Append } } if ($detectedCom) { if ($WhatIf) { "WhatIf: would write PortName = $($detectedCom) at $($dp)" | Tee-Object -FilePath $logFile -Append $createdCount++ } else { try { New-Item -Path $dp -Force | Out-Null New-ItemProperty -Path $dp -Name 'PortName' -PropertyType String -Value $detectedCom -Force -ErrorAction Stop | Out-Null "WROTE PortName = $($detectedCom) at $($dp)" | Tee-Object -FilePath $logFile -Append $createdCount++ } catch { "ERROR writing PortName at $($dp) : $($_.Exception.Message)" | Tee-Object -FilePath $logFile -Append $errors += "PortName write error for $inst : $($_.Exception.Message)" } } } else { "Could not detect COM for $inst; PortName not written." | Tee-Object -FilePath $logFile -Append } } else { "PortName already exists at $($dp): $($portVal) (no change)" | Tee-Object -FilePath $logFile -Append } } catch { "Error reading/writing PortName at $($dp): $($_.Exception.Message)" | Tee-Object -FilePath $logFile -Append $errors += "PortName error for $inst : $($_.Exception.Message)" } # selective-suspend props (create only if missing) $props = @{ DeviceIdleEnabled=0; DefaultIdleState=0; UserSetDeviceIdleEnabled=0; SSIdleTimeout=0 } foreach ($kv in $props.GetEnumerator { $name = $kv.Key; $val = $kv.Value try { $exists = (Get-ItemProperty -Path $dp -Name $name -ErrorAction SilentlyContinue) -ne $null } catch { $exists = $false } if ($exists) { "$($name) already present at $($dp) - skipping" | Tee-Object -FilePath $logFile -Append } else { if ($WhatIf) { "WhatIf: would create $($name) = $($val) at $($dp)" | Tee-Object -FilePath $logFile -Append $createdCount++ } else { try { New-Item -Path $dp -Force | Out-Null New-ItemProperty -Path $dp -Name $name -PropertyType DWord -Value $val -Force -ErrorAction Stop | Out-Null "Created $($name) = $($val) at $($dp)" | Tee-Object -FilePath $logFile -Append $createdCount++ } catch { "ERROR creating $($name) at $($dp) : $($_.Exception.Message)" | Tee-Object -FilePath $logFile -Append $errors += "Create $($name) error for $inst : $($_.Exception.Message)" } } } } break } else { "Not found: $($dp)" | Tee-Object -FilePath $logFile -Append } } # end foreach dpCandidates if (-not $dpFound) { # Create primary Device Parameters and repeat actions $parts = $inst -split '\\' $subpath = [string]($parts -join '\') $regPathBase = Join-Path $enumBase $subpath $dp = Join-Path $regPathBase 'Device Parameters' "Device Parameters not found - creating $($dp)" | Tee-Object -FilePath $logFile -Append if ($WhatIf) { "WhatIf: would create key $($dp) and attempt writes" | Tee-Object -FilePath $logFile -Append $createdCount++ } else { try { New-Item -Path $dp -Force | Out-Null "Created key $($dp)" | Tee-Object -FilePath $logFile -Append } catch { "ERROR creating key $($dp) : $($_.Exception.Message)" | Tee-Object -FilePath $logFile -Append $errors += "Create key error for $inst : $($_.Exception.Message)" continue } # PortName detection and writes $detectedCom = $null $friendly = $p.FriendlyName if ($friendly -and ($friendly -match '\(COM(\d+)\)') { $detectedCom = "COM$($matches[1])" } if (-not $detectedCom) { $detectedCom = Get-ComForInstance -instanceId $inst } if ($detectedCom) { try { New-ItemProperty -Path $dp -Name 'PortName' -PropertyType String -Value $detectedCom -Force -ErrorAction Stop | Out-Null "WROTE PortName = $($detectedCom) at $($dp)" | Tee-Object -FilePath $logFile -Append $createdCount++ } catch { "ERROR writing PortName at $($dp) : $($_.Exception.Message)" | Tee-Object -FilePath $logFile -Append $errors += "PortName write error for $inst : $($_.Exception.Message)" } } else { "Could not detect COM for $inst after creating key." | Tee-Object -FilePath $logFile -Append } # create selective-suspend props foreach ($kv in @{ DeviceIdleEnabled=0; DefaultIdleState=0; UserSetDeviceIdleEnabled=0; SSIdleTimeout=0 }.GetEnumerator { try { New-ItemProperty -Path $dp -Name $kv.Key -PropertyType DWord -Value $kv.Value -Force -ErrorAction Stop | Out-Null "Created $($kv.Key) = $($kv.Value) at $($dp)" | Tee-Object -FilePath $logFile -Append $createdCount++ } catch { "ERROR creating $($kv.Key) at $($dp) : $($_.Exception.Message)" | Tee-Object -FilePath $logFile -Append $errors += "Create prop error $($kv.Key) for $inst : $($_.Exception.Message)" } } } } } # end foreach ports "Created/changed count: $createdCount" | Tee-Object -FilePath $logFile -Append
if ($errors.Count -gt 0) { "Errors: $($errors.Count)" | Tee-Object -FilePath $logFile -Append; $errors | Tee-Object -FilePath $logFile -Append } # Rescan devices
try { "Running device rescan: pnputil /scan-devices" | Tee-Object -FilePath $logFile -Append Start-Process -FilePath 'pnputil.exe' -ArgumentList '/scan-devices' -NoNewWindow -Wait
} catch { "pnputil failed: $($_.Exception.Message)" | Tee-Object -FilePath $logFile -Append
} if (($createdCount -gt 0) -and (-not $WhatIf) -and (-not $NoReboot) { "Scheduling reboot in 15 seconds so changes take effect (abort with 'shutdown /a')." | Tee-Object -FilePath $logFile -Append Start-Process -FilePath 'shutdown.exe' -ArgumentList @('/r','/t','15','/c','Applying FTDI Device Parameter changes') -NoNewWindow
} else { "No reboot scheduled. If you created properties and want immediate recognition, run: pnputil /scan-devices or reboot manually." | Tee-Object -FilePath $logFile -Append
} "Completed: $(Get-Date -Format u)" | Tee-Object -FilePath $logFile -Append
Write-Output "Done. Log saved to: $logFile"

<#
Disable-FTDI-SelectiveSuspend-ApplyIfMissing-WithPortName.ps1
Patched: runs pnputil non-blocking so script doesn't hang.
Run elevated. Use -WhatIf to dry-run.
#> param( [switch]$WhatIf, [switch]$NoReboot) if (-not ([Security.Principal.WindowsPrincipal] [Security.Principal.WindowsIdentity]::GetCurrent.IsInRole([Security.Principal.WindowsBuiltinRole]::Administrator) { Write-Error "Run this script elevated (Run as Administrator). Exiting." exit 1
} $timestamp = (Get-Date).ToString('yyyyMMdd_HHmmss')
$logFile = Join-Path $env:USERPROFILE ("Desktop\FTDI_ApplyIfMissing_WithPortName_$timestamp.log")
"Started: $(Get-Date -Format u)" | Out-File -FilePath $logFile -Encoding UTF8 function Get-ComForInstance { param([string]$instanceId) try { $sp = Get-CimInstance -ClassName Win32_SerialPort -ErrorAction SilentlyContinue | Where-Object { $_.PNPDeviceID -eq $instanceId } if ($sp) { return $sp.DeviceID } $tail = ($instanceId -split '\\')[-1] if ($tail) { $sp = Get-CimInstance -ClassName Win32_SerialPort -ErrorAction SilentlyContinue | Where-Object { $_.PNPDeviceID -like "*$tail*" } if ($sp) { return $sp.DeviceID } } } catch { } return $null
} $ports = Get-PnpDevice -Class Ports -PresentOnly -ErrorAction SilentlyContinue | Where-Object { ($_.Manufacturer -and $_.Manufacturer -like '*FTDI*') -or ($_.InstanceId -and $_.InstanceId -match 'VID_0403') } if (-not $ports -or $ports.Count -eq 0) { "No FTDI COM ports found." | Tee-Object -FilePath $logFile -Append Write-Output "No FTDI COM ports found. See log: $logFile" exit 0
} "Found $($ports.Count) FTDI COM port(s)." | Tee-Object -FilePath $logFile -Append $createdCount = 0
$errors = @
$enumBase = 'HKLM:\SYSTEM\CurrentControlSet\Enum' foreach ($p in $ports) { "----" | Tee-Object -FilePath $logFile -Append "Device FriendlyName: $($p.FriendlyName)" | Tee-Object -FilePath $logFile -Append "InstanceId: $($p.InstanceId)" | Tee-Object -FilePath $logFile -Append $inst = $p.InstanceId if ([string]::IsNullOrWhiteSpace($inst) { "InstanceId empty; skipping" | Tee-Object -FilePath $logFile -Append continue } $dpCandidates = @ try { $tail = ($inst -split '\\')[-1] $matches = Get-ChildItem -Path $enumBase -Recurse -ErrorAction SilentlyContinue | Where-Object { $_.PSPath -match [regex]::Escape($inst) -or ($tail -and ($_.PSPath -match [regex]::Escape($tail) } foreach ($m in $matches) { $node = [string]$m.PSPath $dpCandidates += Join-Path $node 'Device Parameters' $dpCandidates += Join-Path (Join-Path $node '0000') 'Device Parameters' } } catch { } if ($dpCandidates.Count -eq 0) { $parts = $inst -split '\\' $subpath = [string]($parts -join '\') $regPathBase = Join-Path $enumBase $subpath $regPathBase = [string]$regPathBase $dpCandidates += Join-Path $regPathBase 'Device Parameters' $dpCandidates += Join-Path (Join-Path $regPathBase '0000') 'Device Parameters' } $dpFound = $false foreach ($dp in $dpCandidates) { "Checking: $dp" | Tee-Object -FilePath $logFile -Append if (Test-Path $dp) { $dpFound = $true "Using Device Parameters: $($dp)" | Tee-Object -FilePath $logFile -Append try { $portVal = $null try { $portVal = (Get-ItemProperty -Path $dp -Name 'PortName' -ErrorAction SilentlyContinue).PortName } catch { $portVal = $null } if ([string]::IsNullOrWhiteSpace($portVal) { $friendly = $p.FriendlyName $detectedCom = $null if ($friendly -and ($friendly -match '\(COM(\d+)\)') { $detectedCom = "COM$($matches[1])" "Detected COM from FriendlyName: $($detectedCom)" | Tee-Object -FilePath $logFile -Append } else { $detectedCom = Get-ComForInstance -instanceId $inst if ($detectedCom) { "Detected COM via WMI: $($detectedCom)" | Tee-Object -FilePath $logFile -Append } } if ($detectedCom) { if ($WhatIf) { "WhatIf: would write PortName = $($detectedCom) at $($dp)" | Tee-Object -FilePath $logFile -Append $createdCount++ } else { try { New-Item -Path $dp -Force | Out-Null New-ItemProperty -Path $dp -Name 'PortName' -PropertyType String -Value $detectedCom -Force -ErrorAction Stop | Out-Null "WROTE PortName = $($detectedCom) at $($dp)" | Tee-Object -FilePath $logFile -Append $createdCount++ } catch { "ERROR writing PortName at $($dp) : $($_.Exception.Message)" | Tee-Object -FilePath $logFile -Append $errors += "PortName write error for $inst : $($_.Exception.Message)" } } } else { "Could not detect COM for $inst; PortName not written." | Tee-Object -FilePath $logFile -Append } } else { "PortName already exists at $($dp): $($portVal) (no change)" | Tee-Object -FilePath $logFile -Append } } catch { "Error reading/writing PortName at $($dp): $($_.Exception.Message)" | Tee-Object -FilePath $logFile -Append $errors += "PortName error for $inst : $($_.Exception.Message)" } $props = @{ DeviceIdleEnabled=0; DefaultIdleState=0; UserSetDeviceIdleEnabled=0; SSIdleTimeout=0 } foreach ($kv in $props.GetEnumerator { $name = $kv.Key; $val = $kv.Value try { $exists = (Get-ItemProperty -Path $dp -Name $name -ErrorAction SilentlyContinue) -ne $null } catch { $exists = $false } if ($exists) { "$($name) already present at $($dp) - skipping" | Tee-Object -FilePath $logFile -Append } else { if ($WhatIf) { "WhatIf: would create $($name) = $($val) at $($dp)" | Tee-Object -FilePath $logFile -Append $createdCount++ } else { try { New-Item -Path $dp -Force | Out-Null New-ItemProperty -Path $dp -Name $name -PropertyType DWord -Value $val -Force -ErrorAction Stop | Out-Null "Created $($name) = $($val) at $($dp)" | Tee-Object -FilePath $logFile -Append $createdCount++ } catch { "ERROR creating $($name) at $($dp) : $($_.Exception.Message)" | Tee-Object -FilePath $logFile -Append $errors += "Create $($name) error for $inst : $($_.Exception.Message)" } } } } break } else { "Not found: $($dp)" | Tee-Object -FilePath $logFile -Append } } if (-not $dpFound) { $parts = $inst -split '\\' $subpath = [string]($parts -join '\') $regPathBase = Join-Path $enumBase $subpath $dp = Join-Path $regPathBase 'Device Parameters' "Device Parameters not found - creating $($dp)" | Tee-Object -FilePath $logFile -Append if ($WhatIf) { "WhatIf: would create key $($dp) and attempt writes" | Tee-Object -FilePath $logFile -Append $createdCount++ } else { try { New-Item -Path $dp -Force | Out-Null "Created key $($dp)" | Tee-Object -FilePath $logFile -Append } catch { "ERROR creating key $($dp) : $($_.Exception.Message)" | Tee-Object -FilePath $logFile -Append $errors += "Create key error for $inst : $($_.Exception.Message)" continue } $detectedCom = $null $friendly = $p.FriendlyName if ($friendly -and ($friendly -match '\(COM(\d+)\)') { $detectedCom = "COM$($matches[1])" } if (-not $detectedCom) { $detectedCom = Get-ComForInstance -instanceId $inst } if ($detectedCom) { try { New-ItemProperty -Path $dp -Name 'PortName' -PropertyType String -Value $detectedCom -Force -ErrorAction Stop | Out-Null "WROTE PortName = $($detectedCom) at $($dp)" | Tee-Object -FilePath $logFile -Append $createdCount++ } catch { "ERROR writing PortName at $($dp) : $($_.Exception.Message)" | Tee-Object -FilePath $logFile -Append $errors += "PortName write error for $inst : $($_.Exception.Message)" } } else { "Could not detect COM for $inst after creating key." | Tee-Object -FilePath $logFile -Append } foreach ($kv in @{ DeviceIdleEnabled=0; DefaultIdleState=0; UserSetDeviceIdleEnabled=0; SSIdleTimeout=0 }.GetEnumerator { try { New-ItemProperty -Path $dp -Name $kv.Key -PropertyType DWord -Value $kv.Value -Force -ErrorAction Stop | Out-Null "Created $($kv.Key) = $($kv.Value) at $($dp)" | Tee-Object -FilePath $logFile -Append $createdCount++ } catch { "ERROR creating $($kv.Key) at $($dp) : $($_.Exception.Message)" | Tee-Object -FilePath $logFile -Append $errors += "Create prop error $($kv.Key) for $inst : $($_.Exception.Message)" } } } } } "Created/changed count: $createdCount" | Tee-Object -FilePath $logFile -Append
if ($errors.Count -gt 0) { "Errors: $($errors.Count)" | Tee-Object -FilePath $logFile -Append; $errors | Tee-Object -FilePath $logFile -Append } # Rescan devices (launch pnputil asynchronously so script finishes)
try { "Launching device rescan (pnputil /scan-devices) in background" | Tee-Object -FilePath $logFile -Append $proc = Start-Process -FilePath 'pnputil.exe' -ArgumentList '/scan-devices' -NoNewWindow -PassThru "pnputil started (PID $($proc.Id)" | Tee-Object -FilePath $logFile -Append
} catch { "pnputil failed to start: $($_.Exception.Message)" | Tee-Object -FilePath $logFile -Append
} if (($createdCount -gt 0) -and (-not $WhatIf) -and (-not $NoReboot) { "Scheduling reboot in 15 seconds so changes take effect (abort with 'shutdown /a')." | Tee-Object -FilePath $logFile -Append Start-Process -FilePath 'shutdown.exe' -ArgumentList @('/r','/t','15','/c','Applying FTDI Device Parameter changes') -NoNewWindow
} else { "No reboot scheduled. If you created properties and want immediate recognition, run: pnputil /scan-devices or reboot manually." | Tee-Object -FilePath $logFile -Append
} "Completed: $(Get-Date -Format u)" | Tee-Object -FilePath $logFile -Append
Write-Output "Done. Log saved to: $logFile"

<#
Disable-FTDI-SelectiveSuspend-ApplyIfMissing-WithPortName.ps1
- Only writes properties if missing OR if current value differs from desired.
- Writes PortName (from FriendlyName or WMI) only when missing or different.
- Creates selective-suspend DWords only if missing or different from 0.
- Does NOT change actual COM assignment.
- Logs to Desktop; launches pnputil non-blocking; schedules a 15s reboot if real changes occurred.
Run elevated. Use -WhatIf to dry-run.
#> param( [switch]$WhatIf, [switch]$NoReboot) # require elevation
if (-not ([Security.Principal.WindowsPrincipal] [Security.Principal.WindowsIdentity]::GetCurrent.IsInRole([Security.Principal.WindowsBuiltinRole]::Administrator) { Write-Error "Run this script elevated (Run as Administrator). Exiting." exit 1
} $timestamp = (Get-Date).ToString('yyyyMMdd_HHmmss')
$logFile = Join-Path $env:USERPROFILE ("Desktop\FTDI_ApplyIfMissing_WithPortName_$timestamp.log")
"Started: $(Get-Date -Format u)" | Out-File -FilePath $logFile -Encoding UTF8 function Get-ComForInstance { param([string]$instanceId) try { $sp = Get-CimInstance -ClassName Win32_SerialPort -ErrorAction SilentlyContinue | Where-Object { $_.PNPDeviceID -eq $instanceId } if ($sp) { return $sp.DeviceID } $tail = ($instanceId -split '\\')[-1] if ($tail) { $sp = Get-CimInstance -ClassName Win32_SerialPort -ErrorAction SilentlyContinue | Where-Object { $_.PNPDeviceID -like "*$tail*" } if ($sp) { return $sp.DeviceID } } } catch { } return $null
} # Helper: set property only if missing or value differs. Returns $true if written (or would be written under -WhatIf)
function Ensure-Property { param( [string]$Path, [string]$Name, [ValidateSet('String','DWord')] [string]$Type, $DesiredValue) # read existing $existing = $null try { $prop = Get-ItemProperty -Path $Path -Name $Name -ErrorAction SilentlyContinue if ($prop -ne $null) { $existing = $prop.$Name } } catch { $existing = $null } # Normalize for comparison: DWord -> int, String -> string if ($Type -eq 'DWord') { if ($null -ne $existing) { try { $existingInt = [int]$existing } catch { $existingInt = $null } } else { $existingInt = $null } $desiredInt = [int]$DesiredValue if ($existingInt -ne $null -and $existingInt -eq $desiredInt) { # already same return $false } else { if ($WhatIf) { "$Name would be set to $desiredInt at $Path (existing: $existingInt)" | Tee-Object -FilePath $logFile -Append return $true } else { try { New-Item -Path $Path -Force | Out-Null New-ItemProperty -Path $Path -Name $Name -PropertyType DWord -Value $desiredInt -Force -ErrorAction Stop | Out-Null "$Name set to $desiredInt at $Path" | Tee-Object -FilePath $logFile -Append return $true } catch { "ERROR writing $Name at $Path : $($_.Exception.Message)" | Tee-Object -FilePath $logFile -Append return $false } } } } else { # string type compare (case-insensitive) $existingStr = $null if ($null -ne $existing) { $existingStr = [string]$existing } $desiredStr = [string]$DesiredValue if ($existingStr -ne $null -and $existingStr.Equals($desiredStr, [System.StringComparison]::OrdinalIgnoreCase) { return $false } else { if ($WhatIf) { "$Name would be set to '$desiredStr' at $Path (existing: '$existingStr')" | Tee-Object -FilePath $logFile -Append return $true } else { try { New-Item -Path $Path -Force | Out-Null New-ItemProperty -Path $Path -Name $Name -PropertyType String -Value $desiredStr -Force -ErrorAction Stop | Out-Null "$Name set to '$desiredStr' at $Path" | Tee-Object -FilePath $logFile -Append return $true } catch { "ERROR writing $Name at $Path : $($_.Exception.Message)" | Tee-Object -FilePath $logFile -Append return $false } } } }
} # find FTDI ports
$ports = Get-PnpDevice -Class Ports -PresentOnly -ErrorAction SilentlyContinue | Where-Object { ($_.Manufacturer -and $_.Manufacturer -like '*FTDI*') -or ($_.InstanceId -and $_.InstanceId -match 'VID_0403') } if (-not $ports -or $ports.Count -eq 0) { "No FTDI COM ports found." | Tee-Object -FilePath $logFile -Append Write-Output "No FTDI COM ports found. See log: $logFile" exit 0
} "Found $($ports.Count) FTDI COM port(s)." | Tee-Object -FilePath $logFile -Append $createdCount = 0
$errors = @
$enumBase = 'HKLM:\SYSTEM\CurrentControlSet\Enum' foreach ($p in $ports) { "----" | Tee-Object -FilePath $logFile -Append "Device FriendlyName: $($p.FriendlyName)" | Tee-Object -FilePath $logFile -Append "InstanceId: $($p.InstanceId)" | Tee-Object -FilePath $logFile -Append $inst = $p.InstanceId if ([string]::IsNullOrWhiteSpace($inst) { "InstanceId empty; skipping" | Tee-Object -FilePath $logFile -Append continue } # build candidate Device Parameters paths (search Enum first) $dpCandidates = @ try { $tail = ($inst -split '\\')[-1] $matches = Get-ChildItem -Path $enumBase -Recurse -ErrorAction SilentlyContinue | Where-Object { $_.PSPath -match [regex]::Escape($inst) -or ($tail -and ($_.PSPath -match [regex]::Escape($tail) } foreach ($m in $matches) { $node = [string]$m.PSPath $dpCandidates += Join-Path $node 'Device Parameters' $dpCandidates += Join-Path (Join-Path $node '0000') 'Device Parameters' } } catch { } if ($dpCandidates.Count -eq 0) { $parts = $inst -split '\\' $subpath = [string]($parts -join '\') $regPathBase = Join-Path $enumBase $subpath $regPathBase = [string]$regPathBase $dpCandidates += Join-Path $regPathBase 'Device Parameters' $dpCandidates += Join-Path (Join-Path $regPathBase '0000') 'Device Parameters' } $dpFound = $false foreach ($dp in $dpCandidates) { "Checking: $($dp)" | Tee-Object -FilePath $logFile -Append if (Test-Path $dp) { $dpFound = $true "Using Device Parameters: $($dp)" | Tee-Object -FilePath $logFile -Append # detect COM (FriendlyName first, then WMI) $friendly = $p.FriendlyName $detectedCom = $null if ($friendly) { $m = [regex]::Match($friendly,'\(COM(\d+)\)') if ($m.Success) { $detectedCom = "COM$($m.Groups[1].Value)" ; "Detected COM from FriendlyName: $($detectedCom)" | Tee-Object -FilePath $logFile -Append } } if (-not $detectedCom) { $detectedCom = Get-ComForInstance -instanceId $inst if ($detectedCom) { "Detected COM via WMI: $($detectedCom)" | Tee-Object -FilePath $logFile -Append } } # PortName: only change if missing or different if ($detectedCom) { $changed = Ensure-Property -Path $dp -Name 'PortName' -Type 'String' -DesiredValue $detectedCom if ($changed) { $createdCount++ } } else { "Could not detect COM for $inst; PortName left alone." | Tee-Object -FilePath $logFile -Append } # selective-suspend DWords: ensure exist and equal 0 foreach ($kv in @{ DeviceIdleEnabled=0; DefaultIdleState=0; UserSetDeviceIdleEnabled=0; SSIdleTimeout=0 }.GetEnumerator { $name = $kv.Key; $val = $kv.Value $changed = Ensure-Property -Path $dp -Name $name -Type 'DWord' -DesiredValue $val if ($changed) { $createdCount++ } } break } else { "Not found: $($dp)" | Tee-Object -FilePath $logFile -Append } } if (-not $dpFound) { # create primary Device Parameters key and retry $parts = $inst -split '\\' $subpath = [string]($parts -join '\') $regPathBase = Join-Path $enumBase $subpath $dp = Join-Path $regPathBase 'Device Parameters' "Device Parameters not found - creating $($dp)" | Tee-Object -FilePath $logFile -Append if ($WhatIf) { "WhatIf: would create key $($dp) and attempt writes" | Tee-Object -FilePath $logFile -Append } else { try { New-Item -Path $dp -Force | Out-Null "Created key $($dp)" | Tee-Object -FilePath $logFile -Append } catch { "ERROR creating key $($dp) : $($_.Exception.Message)" | Tee-Object -FilePath $logFile -Append $errors += "Create key error for $inst : $($_.Exception.Message)" continue } } # same writes after creating key $friendly = $p.FriendlyName $detectedCom = $null if ($friendly) { $m = [regex]::Match($friendly,'\(COM(\d+)\)') if ($m.Success) { $detectedCom = "COM$($m.Groups[1].Value)" ; "Detected COM from FriendlyName: $($detectedCom)" | Tee-Object -FilePath $logFile -Append } } if (-not $detectedCom) { $detectedCom = Get-ComForInstance -instanceId $inst if ($detectedCom) { "Detected COM via WMI: $($detectedCom)" | Tee-Object -FilePath $logFile -Append } } if ($detectedCom) { $changed = Ensure-Property -Path $dp -Name 'PortName' -Type 'String' -DesiredValue $detectedCom if ($changed) { $createdCount++ } } else { "Could not detect COM for $inst after creating key." | Tee-Object -FilePath $logFile -Append } foreach ($kv in @{ DeviceIdleEnabled=0; DefaultIdleState=0; UserSetDeviceIdleEnabled=0; SSIdleTimeout=0 }.GetEnumerator { $changed = Ensure-Property -Path $dp -Name $kv.Key -Type 'DWord' -DesiredValue $kv.Value if ($changed) { $createdCount++ } } } } # end foreach ports "Created/changed count: $createdCount" | Tee-Object -FilePath $logFile -Append
if ($errors.Count -gt 0) { "Errors: $($errors.Count)" | Tee-Object -FilePath $logFile -Append; $errors | Tee-Object -FilePath $logFile -Append } # Rescan devices (launch pnputil asynchronously so script finishes)
try { "Launching device rescan (pnputil /scan-devices) in background" | Tee-Object -FilePath $logFile -Append $proc = Start-Process -FilePath 'pnputil.exe' -ArgumentList '/scan-devices' -NoNewWindow -PassThru "pnputil started (PID $($proc.Id)" | Tee-Object -FilePath $logFile -Append
} catch { "pnputil failed to start: $($_.Exception.Message)" | Tee-Object -FilePath $logFile -Append
} if (($createdCount -gt 0) -and (-not $WhatIf) -and (-not $NoReboot) { "Scheduling reboot in 15 seconds so changes take effect (abort with 'shutdown /a')." | Tee-Object -FilePath $logFile -Append Start-Process -FilePath 'shutdown.exe' -ArgumentList @('/r','/t','15','/c','Applying FTDI Device Parameter changes') -NoNewWindow
} else { "No reboot scheduled. If you created properties and want immediate recognition, run: pnputil /scan-devices or reboot manually." | Tee-Object -FilePath $logFile -Append
} "Completed: $(Get-Date -Format u)" | Tee-Object -FilePath $logFile -Append
Write-Output "Done. Log saved to: $logFile"

<#
Disable-FTDI-SelectiveSuspend-ApplyIfMissing-WithPortName-Patched.ps1
- Idempotent: only creates missing registry values and skips already-processed Device Parameters keys.
- Does NOT overwrite existing values, does NOT change PortName if present.
- Writes PortName from FriendlyName or WMI only when missing.
- Launches pnputil in background so script exits quickly.
Run as Administrator. Use -WhatIf to dry-run.
#> param( [switch]$WhatIf, [switch]$NoReboot) if (-not ([Security.Principal.WindowsPrincipal] [Security.Principal.WindowsIdentity]::GetCurrent.IsInRole([Security.Principal.WindowsBuiltinRole]::Administrator) { Write-Error "Run elevated (Run as Administrator). Exiting." exit 1
} $timestamp = (Get-Date).ToString('yyyyMMdd_HHmmss')
$logFile = Join-Path $env:USERPROFILE ("Desktop\FTDI_ApplyIfMissing_WithPortName_Patched_$timestamp.log")
"Started: $(Get-Date -Format u)" | Out-File -FilePath $logFile -Encoding UTF8 function Get-ComForInstance { param([string]$instanceId) try { $sp = Get-CimInstance -ClassName Win32_SerialPort -ErrorAction SilentlyContinue | Where-Object { $_.PNPDeviceID -eq $instanceId } if ($sp) { return $sp.DeviceID } $tail = ($instanceId -split '\\')[-1] if ($tail) { $sp = Get-CimInstance -ClassName Win32_SerialPort -ErrorAction SilentlyContinue | Where-Object { $_.PNPDeviceID -like "*$tail*" } if ($sp) { return $sp.DeviceID } } } catch { } return $null
} # Discover FTDI COM ports
$ports = Get-PnpDevice -Class Ports -PresentOnly -ErrorAction SilentlyContinue | Where-Object { ($_.Manufacturer -and $_.Manufacturer -like '*FTDI*') -or ($_.InstanceId -and $_.InstanceId -match 'VID_0403') } if (-not $ports -or $ports.Count -eq 0) { "No FTDI COM ports found." | Tee-Object -FilePath $logFile -Append Write-Output "No FTDI COM ports found. See log: $logFile" exit 0
} "Found $($ports.Count) FTDI COM port(s)." | Tee-Object -FilePath $logFile -Append $createdCount = 0
$errors = @
$enumBase = 'HKLM:\SYSTEM\CurrentControlSet\Enum'
$processedDp = @{} # hashset of DP paths already processed this run foreach ($p in $ports) { "----" | Tee-Object -FilePath $logFile -Append "Device FriendlyName: $($p.FriendlyName)" | Tee-Object -FilePath $logFile -Append "InstanceId: $($p.InstanceId)" | Tee-Object -FilePath $logFile -Append $inst = $p.InstanceId if ([string]::IsNullOrWhiteSpace($inst) { "InstanceId empty; skipping" | Tee-Object -FilePath $logFile -Append continue } # Build candidate Device Parameters paths (try to find matching Enum nodes) $dpCandidates = @ try { $tail = ($inst -split '\\')[-1] $matches = Get-ChildItem -Path $enumBase -Recurse -ErrorAction SilentlyContinue | Where-Object { $_.PSPath -match [regex]::Escape($inst) -or ($tail -and ($_.PSPath -match [regex]::Escape($tail) } foreach ($m in $matches) { $node = [string]$m.PSPath $dpCandidates += Join-Path $node 'Device Parameters' $dpCandidates += Join-Path (Join-Path $node '0000') 'Device Parameters' } } catch { } if ($dpCandidates.Count -eq 0) { $parts = $inst -split '\\' $subpath = [string]($parts -join '\') $regPathBase = Join-Path $enumBase $subpath $regPathBase = [string]$regPathBase $dpCandidates += Join-Path $regPathBase 'Device Parameters' $dpCandidates += Join-Path (Join-Path $regPathBase '0000') 'Device Parameters' } $dpFoundForInstance = $false foreach ($dp in $dpCandidates) { # Normalize dp to plain registry path string for use in hashset $dpStr = [string]$dp "Checking: $dpStr" | Tee-Object -FilePath $logFile -Append if ($processedDp.ContainsKey($dpStr) { "Already processed $dpStr in this run - skipping." | Tee-Object -FilePath $logFile -Append # mark that we found a DP for this instance, but skip actual processing $dpFoundForInstance = $true break } if (Test-Path $dpStr) { $dpFoundForInstance = $true "Using Device Parameters: $dpStr" | Tee-Object -FilePath $logFile -Append # mark as processed so other instances that resolve to same DP won't redo it $processedDp[$dpStr] = $true # 1) PortName - write only if property name not present try { $item = Get-ItemProperty -Path $dpStr -ErrorAction SilentlyContinue $props = if ($item) { $item.PSObject.Properties | ForEach-Object { $_.Name } } else { @ } if (-not ($props -contains 'PortName') { # detect COM from FriendlyName or WMI $friendly = $p.FriendlyName $detectedCom = $null if ($friendly -and ($friendly -match '\(COM(\d+)\)') { $detectedCom = "COM$($matches[1])" "Detected COM from FriendlyName: $($detectedCom)" | Tee-Object -FilePath $logFile -Append } else { $detectedCom = Get-ComForInstance -instanceId $inst if ($detectedCom) { "Detected COM via WMI: $($detectedCom)" | Tee-Object -FilePath $logFile -Append } } if ($detectedCom) { if (-not $WhatIf) { try { New-Item -Path $dpStr -Force | Out-Null New-ItemProperty -Path $dpStr -Name 'PortName' -PropertyType String -Value $detectedCom -Force -ErrorAction Stop | Out-Null "WROTE PortName = $($detectedCom) at $($dpStr)" | Tee-Object -FilePath $logFile -Append $createdCount++ } catch { "ERROR writing PortName at $($dpStr) : $($_.Exception.Message)" | Tee-Object -FilePath $logFile -Append $errors += "PortName write error for $inst : $($_.Exception.Message)" } } else { "WhatIf: would write PortName = $($detectedCom) at $($dpStr)" | Tee-Object -FilePath $logFile -Append } } else { "Could not detect COM for $inst; PortName not written." | Tee-Object -FilePath $logFile -Append } } else { "PortName already present at $($dpStr): $((Get-ItemProperty -Path $dpStr -Name 'PortName' -ErrorAction SilentlyContinue).PortName) - not changed" | Tee-Object -FilePath $logFile -Append } } catch { "Error reading/writing PortName at $($dpStr): $($_.Exception.Message)" | Tee-Object -FilePath $logFile -Append $errors += "PortName error for $inst : $($_.Exception.Message)" } # 2) selective-suspend props - create only if the property name does not exist $propsToCreate = @{ DeviceIdleEnabled=0; DefaultIdleState=0; UserSetDeviceIdleEnabled=0; SSIdleTimeout=0 } foreach ($kv in $propsToCreate.GetEnumerator { $name = $kv.Key; $val = $kv.Value try { $existsName = $false $item = Get-ItemProperty -Path $dpStr -ErrorAction SilentlyContinue if ($item) { $existsName = ($item.PSObject.Properties | ForEach-Object { $_.Name }) -contains $name } } catch { $existsName = $false } if ($existsName) { "$($name) already present at $($dpStr) - skipping" | Tee-Object -FilePath $logFile -Append } else { if (-not $WhatIf) { try { New-Item -Path $dpStr -Force | Out-Null New-ItemProperty -Path $dpStr -Name $name -PropertyType DWord -Value $val -Force -ErrorAction Stop | Out-Null "Created $($name) = $($val) at $($dpStr)" | Tee-Object -FilePath $logFile -Append $createdCount++ } catch { "ERROR creating $($name) at $($dpStr) : $($_.Exception.Message)" | Tee-Object -FilePath $logFile -Append $errors += "Create $($name) error for $inst : $($_.Exception.Message)" } } else { "WhatIf: would create $($name) = $($val) at $($dpStr)" | Tee-Object -FilePath $logFile -Append } } } break } else { "Not found: $($dp)" | Tee-Object -FilePath $logFile -Append } } # end foreach dpCandidates if (-not $dpFoundForInstance) { # create primary Device Parameters and perform same operations once $parts = $inst -split '\\' $subpath = [string]($parts -join '\') $regPathBase = Join-Path $enumBase $subpath $dp = Join-Path $regPathBase 'Device Parameters' $dp = [string]$dp if ($processedDp.ContainsKey($dp) { "Primary DP $dp already processed - skipping." | Tee-Object -FilePath $logFile -Append continue } "Device Parameters not found - creating primary $($dp)" | Tee-Object -FilePath $logFile -Append $processedDp[$dp] = $true if ($WhatIf) { "WhatIf: would create key $($dp) and attempt writes" | Tee-Object -FilePath $logFile -Append } else { try { New-Item -Path $dp -Force | Out-Null "Created key $($dp)" | Tee-Object -FilePath $logFile -Append } catch { "ERROR creating key $($dp) : $($_.Exception.Message)" | Tee-Object -FilePath $logFile -Append $errors += "Create key error for $inst : $($_.Exception.Message)" continue } # PortName detection/write $detectedCom = $null $friendly = $p.FriendlyName if ($friendly -and ($friendly -match '\(COM(\d+)\)') { $detectedCom = "COM$($matches[1])" } if (-not $detectedCom) { $detectedCom = Get-ComForInstance -instanceId $inst } if ($detectedCom) { try { New-ItemProperty -Path $dp -Name 'PortName' -PropertyType String -Value $detectedCom -Force -ErrorAction Stop | Out-Null "WROTE PortName = $($detectedCom) at $($dp)" | Tee-Object -FilePath $logFile -Append $createdCount++ } catch { "ERROR writing PortName at $($dp) : $($_.Exception.Message)" | Tee-Object -FilePath $logFile -Append $errors += "PortName write error for $inst : $($_.Exception.Message)" } } else { "Could not detect COM for $inst after creating key." | Tee-Object -FilePath $logFile -Append } # create selective-suspend props foreach ($kv in @{ DeviceIdleEnabled=0; DefaultIdleState=0; UserSetDeviceIdleEnabled=0; SSIdleTimeout=0 }.GetEnumerator { try { New-ItemProperty -Path $dp -Name $kv.Key -PropertyType DWord -Value $kv.Value -Force -ErrorAction Stop | Out-Null "Created $($kv.Key) = $($kv.Value) at $($dp)" | Tee-Object -FilePath $logFile -Append $createdCount++ } catch { "ERROR creating $($kv.Key) at $($dp) : $($_.Exception.Message)" | Tee-Object -FilePath $logFile -Append $errors += "Create prop error $($kv.Key) for $inst : $($_.Exception.Message)" } } } } } # end foreach ports "Created/changed count: $createdCount" | Tee-Object -FilePath $logFile -Append
if ($errors.Count -gt 0) { "Errors: $($errors.Count)" | Tee-Object -FilePath $logFile -Append; $errors | Tee-Object -FilePath $logFile -Append } # Launch pnputil asynchronously so script ends quickly
try { "Launching device rescan (pnputil /scan-devices) in background" | Tee-Object -FilePath $logFile -Append $proc = Start-Process -FilePath 'pnputil.exe' -ArgumentList '/scan-devices' -NoNewWindow -PassThru "pnputil started (PID $($proc.Id)" | Tee-Object -FilePath $logFile -Append
} catch { "pnputil failed to start: $($_.Exception.Message)" | Tee-Object -FilePath $logFile -Append
} if (($createdCount -gt 0) -and (-not $WhatIf) -and (-not $NoReboot) { "Scheduling reboot in 15 seconds so changes take effect (abort with 'shutdown /a')." | Tee-Object -FilePath $logFile -Append Start-Process -FilePath 'shutdown.exe' -ArgumentList @('/r','/t','15','/c','Applying FTDI Device Parameter changes') -NoNewWindow
} else { "No reboot scheduled. If you created properties and want immediate recognition, run: pnputil /scan-devices or reboot manually." | Tee-Object -FilePath $logFile -Append
} "Completed: $(Get-Date -Format u)" | Tee-Object -FilePath $logFile -Append
Write-Output "Done. Log saved to: $logFile"

<#
Disable-FTDI-SelectiveSuspend-Final.ps1
- Uses the device InstanceId directly to target HKLM:\SYSTEM\CurrentControlSet\Enum\<Instance>\Device Parameters
- Creates Device Parameters if missing, sets PortName (from FriendlyName or WMI) if missing, and creates selective-suspend values only if missing.
- Idempotent: will not overwrite existing values and will not re-process the same Device Parameters path multiple times per run.
- Launches pnputil in background and schedules a 15s reboot if changes were made (abortable with shutdown /a).
Run as Administrator. Use -WhatIf to dry-run.
#> param( [switch]$WhatIf, [switch]$NoReboot) # require elevation
if (-not ([Security.Principal.WindowsPrincipal] [Security.Principal.WindowsIdentity]::GetCurrent.IsInRole([Security.Principal.WindowsBuiltinRole]::Administrator) { Write-Error "Run this script elevated (Run as Administrator). Exiting." exit 1
} $timestamp = (Get-Date).ToString('yyyyMMdd_HHmmss')
$logFile = Join-Path $env:USERPROFILE ("Desktop\FTDI_DisableSelectiveSuspend_Final_$timestamp.log")
"Started: $(Get-Date -Format u)" | Out-File -FilePath $logFile -Encoding UTF8 function Get-ComForInstance { param([string]$instanceId) try { $sp = Get-CimInstance -ClassName Win32_SerialPort -ErrorAction SilentlyContinue | Where-Object { $_.PNPDeviceID -eq $instanceId } if ($sp) { return $sp.DeviceID } $tail = ($instanceId -split '\\')[-1] if ($tail) { $sp = Get-CimInstance -ClassName Win32_SerialPort -ErrorAction SilentlyContinue | Where-Object { $_.PNPDeviceID -like "*$tail*" } if ($sp) { return $sp.DeviceID } } } catch { } return $null
} # Find FTDI ports
$ports = Get-PnpDevice -Class Ports -PresentOnly -ErrorAction SilentlyContinue | Where-Object { ($_.Manufacturer -and $_.Manufacturer -like '*FTDI*') -or ($_.InstanceId -and $_.InstanceId -match 'VID_0403') } if (-not $ports -or $ports.Count -eq 0) { "No FTDI COM ports found." | Tee-Object -FilePath $logFile -Append Write-Output "No FTDI COM ports found. See log: $logFile" exit 0
} "Found $($ports.Count) FTDI COM port(s)." | Tee-Object -FilePath $logFile -Append $createdCount = 0
$errors = @
$processedDp = @{} # track DP paths already processed this run foreach ($p in $ports) { "----" | Tee-Object -FilePath $logFile -Append "Device FriendlyName: $($p.FriendlyName)" | Tee-Object -FilePath $logFile -Append "InstanceId: $($p.InstanceId)" | Tee-Object -FilePath $logFile -Append $inst = $p.InstanceId if ([string]::IsNullOrWhiteSpace($inst) { "InstanceId empty; skipping" | Tee-Object -FilePath $logFile -Append continue } # Build exact registry path from InstanceId (do NOT search Enum by tail) $enumBase = 'HKLM:\SYSTEM\CurrentControlSet\Enum' # Escape and join safely $regPathBase = "HKLM:\SYSTEM\CurrentControlSet\Enum\$inst" $regPathBase = [string]$regPathBase # Candidate Device Parameters locations for this instance $dpCandidates = @( "$regPathBase\Device Parameters", "$regPathBase\0000\Device Parameters") $dpFoundForInstance = $false foreach ($dp in $dpCandidates) { $dpStr = [string]$dp "Checking: $dpStr" | Tee-Object -FilePath $logFile -Append if ($processedDp.ContainsKey($dpStr) { "Already processed $dpStr this run - skipping." | Tee-Object -FilePath $logFile -Append $dpFoundForInstance = $true break } if (Test-Path $dpStr) { $dpFoundForInstance = $true "Using Device Parameters: $dpStr" | Tee-Object -FilePath $logFile -Append # Mark as processed so other devices won't reprocess the same DP $processedDp[$dpStr] = $true # Get existing property names for accurate checks $existingProps = @ try { $item = Get-ItemProperty -Path $dpStr -ErrorAction SilentlyContinue if ($item) { $existingProps = $item.PSObject.Properties | ForEach-Object { $_.Name } } } catch { $existingProps = @ } # PortName - create only if missing if (-not ($existingProps -contains 'PortName') { $friendly = $p.FriendlyName $detectedCom = $null if ($friendly -and ($friendly -match '\(COM(\d+)\)') { $detectedCom = "COM$($matches[1])" "Detected COM from FriendlyName: $($detectedCom)" | Tee-Object -FilePath $logFile -Append } else { $detectedCom = Get-ComForInstance -instanceId $inst if ($detectedCom) { "Detected COM via WMI: $($detectedCom)" | Tee-Object -FilePath $logFile -Append } } if ($detectedCom) { if (-not $WhatIf) { try { New-Item -Path $dpStr -Force | Out-Null New-ItemProperty -Path $dpStr -Name 'PortName' -PropertyType String -Value $detectedCom -Force -ErrorAction Stop | Out-Null "WROTE PortName = $($detectedCom) at $($dpStr)" | Tee-Object -FilePath $logFile -Append $createdCount++ } catch { "ERROR writing PortName at $($dpStr) : $($_.Exception.Message)" | Tee-Object -FilePath $logFile -Append $errors += "PortName write error for $inst : $($_.Exception.Message)" } } else { "WhatIf: would write PortName = $($detectedCom) at $($dpStr)" | Tee-Object -FilePath $logFile -Append } } else { "Could not detect COM for $inst; PortName not written." | Tee-Object -FilePath $logFile -Append } } else { "PortName already present at $($dpStr): $((Get-ItemProperty -Path $dpStr -Name 'PortName' -ErrorAction SilentlyContinue).PortName) - not changed" | Tee-Object -FilePath $logFile -Append } # selective-suspend props - create only if property name not present $propsToCreate = @{ DeviceIdleEnabled=0; DefaultIdleState=0; UserSetDeviceIdleEnabled=0; SSIdleTimeout=0 } foreach ($kv in $propsToCreate.GetEnumerator { $name = $kv.Key; $val = $kv.Value if ($existingProps -contains $name) { "$($name) already present at $($dpStr) - skipping" | Tee-Object -FilePath $logFile -Append } else { if (-not $WhatIf) { try { New-Item -Path $dpStr -Force | Out-Null New-ItemProperty -Path $dpStr -Name $name -PropertyType DWord -Value $val -Force -ErrorAction Stop | Out-Null "Created $($name) = $($val) at $($dpStr)" | Tee-Object -FilePath $logFile -Append $createdCount++ } catch { "ERROR creating $($name) at $($dpStr) : $($_.Exception.Message)" | Tee-Object -FilePath $logFile -Append $errors += "Create $($name) error for $inst : $($_.Exception.Message)" } } else { "WhatIf: would create $($name) = $($val) at $($dpStr)" | Tee-Object -FilePath $logFile -Append } } } break } else { "Not found: $($dpStr)" | Tee-Object -FilePath $logFile -Append } } # end foreach dpCandidates if (-not $dpFoundForInstance) { "No Device Parameters found for instance $inst (expected path: $regPathBase). Creating primary DP." | Tee-Object -FilePath $logFile -Append $dp = "$regPathBase\Device Parameters" $dp = [string]$dp if ($processedDp.ContainsKey($dp) { "Primary DP $dp already processed - skipping creation." | Tee-Object -FilePath $logFile -Append continue } $processedDp[$dp] = $true if ($WhatIf) { "WhatIf: would create key $($dp) and attempt writes" | Tee-Object -FilePath $logFile -Append } else { try { New-Item -Path $dp -Force | Out-Null "Created key $($dp)" | Tee-Object -FilePath $logFile -Append } catch { "ERROR creating key $($dp) : $($_.Exception.Message)" | Tee-Object -FilePath $logFile -Append $errors += "Create key error for $inst : $($_.Exception.Message)" continue } # PortName detection & selective-suspend creation (same logic) $detectedCom = $null $friendly = $p.FriendlyName if ($friendly -and ($friendly -match '\(COM(\d+)\)') { $detectedCom = "COM$($matches[1])" } if (-not $detectedCom) { $detectedCom = Get-ComForInstance -instanceId $inst } if ($detectedCom) { try { New-ItemProperty -Path $dp -Name 'PortName' -PropertyType String -Value $detectedCom -Force -ErrorAction Stop | Out-Null "WROTE PortName = $($detectedCom) at $($dp)" | Tee-Object -FilePath $logFile -Append $createdCount++ } catch { "ERROR writing PortName at $($dp) : $($_.Exception.Message)" | Tee-Object -FilePath $logFile -Append $errors += "PortName write error for $inst : $($_.Exception.Message)" } } else { "Could not detect COM for $inst after creating key." | Tee-Object -FilePath $logFile -Append } foreach ($kv in @{ DeviceIdleEnabled=0; DefaultIdleState=0; UserSetDeviceIdleEnabled=0; SSIdleTimeout=0 }.GetEnumerator { try { New-ItemProperty -Path $dp -Name $kv.Key -PropertyType DWord -Value $kv.Value -Force -ErrorAction Stop | Out-Null "Created $($kv.Key) = $($kv.Value) at $($dp)" | Tee-Object -FilePath $logFile -Append $createdCount++ } catch { "ERROR creating $($kv.Key) at $($dp) : $($_.Exception.Message)" | Tee-Object -FilePath $logFile -Append $errors += "Create prop error $($kv.Key) for $inst : $($_.Exception.Message)" } } } } } # end foreach ports "Created/changed count: $createdCount" | Tee-Object -FilePath $logFile -Append
if ($errors.Count -gt 0) { "Errors: $($errors.Count)" | Tee-Object -FilePath $logFile -Append $errors | Tee-Object -FilePath $logFile -Append
} # Launch pnputil asynchronously so script ends quickly
try { "Launching device rescan (pnputil /scan-devices) in background" | Tee-Object -FilePath $logFile -Append $proc = Start-Process -FilePath 'pnputil.exe' -ArgumentList '/scan-devices' -NoNewWindow -PassThru "pnputil started (PID $($proc.Id)" | Tee-Object -FilePath $logFile -Append
} catch { "pnputil failed to start: $($_.Exception.Message)" | Tee-Object -FilePath $logFile -Append
} if (($createdCount -gt 0) -and (-not $WhatIf) -and (-not $NoReboot) { "Scheduling reboot in 15 seconds so changes take effect (abort with 'shutdown /a')." | Tee-Object -FilePath $logFile -Append Start-Process -FilePath 'shutdown.exe' -ArgumentList @('/r','/t','15','/c','Applying FTDI Device Parameter changes') -NoNewWindow
} else { "No reboot scheduled. If you created properties and want immediate recognition, run: pnputil /scan-devices or reboot manually." | Tee-Object -FilePath $logFile -Append
} "Completed: $(Get-Date -Format u)" | Tee-Object -FilePath $logFile -Append
Write-Output "Done. Log saved to: $logFile"

# Run as Administrator
# Save this entire block in an elevated PowerShell session and run it. # Find one FTDI COM device (or change filter if needed)
$dev = Get-PnpDevice -Class Ports -PresentOnly | Where-Object { ($_.Manufacturer -and $_.Manufacturer -like '*FTDI*') -or ($_.InstanceId -and $_.InstanceId -match 'VID_0403') } | Select-Object -First 1 if (-not $dev) { Write-Error "No FTDI COM device found. Run Get-PnpDevice -Class Ports to inspect." break
} $inst = $dev.InstanceId
Write-Output "Using device: $($dev.FriendlyName) ; InstanceId: $inst" # Build Device Parameters path candidates
$base = "HKLM:\SYSTEM\CurrentControlSet\Enum\$inst"
$candidates = @("$base\Device Parameters","$base\0000\Device Parameters") # Pick the first existing DP path or the first candidate if none exist
$dp = $candidates | Where-Object { Test-Path $_ } | Select-Object -First 1
if (-not $dp) { $dp = $candidates[0]; Write-Output "Device Parameters not found; will inspect/create at: $dp" }
else { Write-Output "Inspecting Device Parameters at: $dp" } $beforeFile = Join-Path $env:USERPROFILE "Desktop\FTDI_DP_before.json"
$afterFile = Join-Path $env:USERPROFILE "Desktop\FTDI_DP_after.json"
$diffFile = Join-Path $env:USERPROFILE "Desktop\FTDI_DP_diff.txt" # capture before
if (Test-Path $dp) { $before = Get-ItemProperty -Path $dp -ErrorAction SilentlyContinue
} else { $before = @{ } # empty
}
$before | ConvertTo-Json -Depth 5 | Out-File -FilePath $beforeFile -Encoding utf8
Write-Output "Saved BEFORE to $beforeFile" Write-Output "Now open Device Manager → Ports → select this device → Properties → Advanced. TOGGLE the 'Enable Selective Suspend' checkbox (check or uncheck) and click OK. When done, come back here and press Enter."
Read-Host -Prompt "Press Enter after toggling the checkbox" # capture after
if (Test-Path $dp) { $after = Get-ItemProperty -Path $dp -ErrorAction SilentlyContinue
} else { $after = @{ } # empty
}
$after | ConvertTo-Json -Depth 5 | Out-File -FilePath $afterFile -Encoding utf8
Write-Output "Saved AFTER to $afterFile" # compute differences (names and values)
$beforeObj = if ((Get-Content $beforeFile -Raw) -ne '') { ConvertFrom-Json (Get-Content $beforeFile -Raw) } else { @{} }
$afterObj = if ((Get-Content $afterFile -Raw) -ne '') { ConvertFrom-Json (Get-Content $afterFile -Raw) } else { @{} } $allNames = (@($beforeObj | Get-Member -MemberType NoteProperty | Select-Object -Expand Name) + @($afterObj | Get-Member -MemberType NoteProperty | Select-Object -Expand Name) | Sort-Object -Unique
$changes = @
foreach ($n in $allNames) { $bv = $null; $av = $null try { $bv = $beforeObj.$n } catch {} try { $av = $afterObj.$n } catch {} if ($bv -ne $av) { $changes += [PSCustomObject]@{ Property = $n; Before = $bv; After = $av } }
} if ($changes.Count -eq 0) { "No property values changed under $dp. If that happens, try toggling again and ensure you toggled the Advanced checkbox for the same instance; alternatively run a broader Enum search." | Out-File -FilePath $diffFile -Encoding utf8 Get-Content $diffFile
} else { $changes | Format-Table -AutoSize $changes | Out-File -FilePath $diffFile -Encoding utf8 Write-Output "Saved diff to $diffFile"
}