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Power management greyed out for LAN/network card in device manager.

Anonymous
2022-12-10T10:54:19+00:00

Hi,

I'm using WOL and need to check 2 boxes in power management for the LAN card in device manager. These are "Allow this device to wake the computer" and "Only allow a magic packet to wake the computer", but for some reason these options are greyed out most of the time. When they are available and i check these 2 boxes, its goes back to unchecked after a restart.

I know that i have the right driver is installed since WOL is working, but my computer wakes up from sleep if i dont check the box "Only allow a magic packet to wake the computer". This wasn't an issue before i did a clean install of windows 11 as both of these boxes was checked (even if the options where greyed out).

I'm confused over what's "enabling/disabling" the options in power management. I'm using the same driver that was working before a clean install. I suspect that the drivers that dosent have the option "wake on magic packet from S5" in the advanced tab, are the drivers that allow me to check these boxes in power management, but wont be saved.

Windows for home | Windows 11 | Devices and drivers

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  1. Anonymous
    2022-12-10T13:59:46+00:00

    I figured it out after a lot of googling. I followed this guide: Power management setting on a network adapter - Windows Client | Microsoft Learn - and added a registry.

    1: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class{4D36E972-E325-11CE-BFC1-08002bE10318}\DeviceNumber

    2: In folder 002 (001 is wifi), i created a new DWORD (32 bit): PnPCapabilities (since it was missing), with hex vaule: 0x118 - "Option 1 is unchecked (Note that option 2 and option 3 will be greyed out as a result)

    3: reboot and problem solved.

    10+ people found this answer helpful.
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