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device codes

About this tag
Device codes are identifiers used in Windows to pinpoint specific hardware components, such as PCI vendor and device IDs. In troubleshooting power management issues, like a computer failing to sleep, users can generate a powercfg report to find these codes. The report reveals device codes for items like USB Root Hub and USB Mass Storage, which may lack a Power Management tab in Windows 7. Understanding these codes helps verify that the latest drivers are installed from manufacturers like Gigabyte and ALI. However, interpreting power capability codes such as PDCAP_D0_SUPPORTED, PDCAP_D2_SUPPORTED, and PDCAP_D3_SUPPORTED can be confusing. This tag covers discussions on using device codes to diagnose sleep problems and driver compatibility.
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    Windows 7 Powercfg report and computer not going to sleep

    So after reading a lot about how to run the report and open it (yes it does not open from the CMD prompt) I was able to find the PCI vendor and device code and ascertain I have the latest drivers from those manufacturers (Gigabyte and ALI). Mainly the USB Root Hub and the USB Mass Storage items...
    • br116
    • Thread
    • computer sleep device codes gigabyte power management powercfg sleep issues system report troubleshooting usb drivers windows 7
    • Replies: 11
    • Forum: Windows Hardware
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