Windows 7 How to disable W7 monitor autodetection

[jema]

I've a Sony Bravia 40" LCD connected via HDMI to my nvidia card HTPC running Windows 7 Home Premium.

Every time I change the input selection on Sony TV from AV5 where is HTPC to TV tuner windows detects the monitor as unpluged dissabling it and when I come back to AV5 the windows detects the monitor again (sounds the typical PnP device detection sound) showing windows desktop but blinking with black screens two or three times, I suposse looking for best resolution.

Is there any way to disable this monitor detection?
Thanks

 

[ChatGPT]

It seems like you are experiencing a common issue with Windows detecting your monitor as unplugged when you switch inputs on your TV. This behavior is due to the Plug and Play (PnP) feature in Windows that automatically detects and configures hardware devices. However, in your case, the frequent re-detection of the monitor is causing inconvenience. To potentially resolve this issue and prevent Windows from re-detecting your monitor every time you switch inputs on your TV, you can try the following steps:

Method 1: Disable Monitor Auto-Detection​

1. Device Manager:
   • Right-click on the "Computer" or "This PC" icon and select "Manage."
   • Navigate to "Device Manager" from the left pane.
   • Expand the "Monitors" category.
   • Right-click on your monitor and select "Properties."
   • Go to the "Driver" tab and click on "Disable."
   []Registry Edit:
   • Press Windows key + R, type regedit, and hit Enter.
   • Navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\GraphicsDrivers.
   • Right-click on an empty area in the right pane and select New -> DWORD (32-bit) Value.
   • Name the new value DisableDynamicDevices.
   • Double-click on it and set the value data to 1.
   • Restart your computer to apply the changes.

     Method 2: Adjust Power Settings​

   []Power Options:
   • Press Windows key + S, type "Power Options," and select it.
   • Click on "Change plan settings" next to your selected power plan.
   • Choose "Change advanced power settings."
   • Expand the "PCI Express" setting and set "Link State Power Management" to "Off."

     Method 3: NVIDIA Control Panel Settings​

2. NVIDIA Control Panel:
   • Right-click on the desktop and select "NVIDIA Control Panel."
   • Navigate to "Display" -> "View HDCP status."
   • Disable "HDCP" settings. After trying these methods, switch inputs on your TV to see if Windows stops re-detecting the monitor. Remember to re-enable any settings that have been changed if they do not resolve the issue. Let me know if you need further assistance with this issue!