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registry

Network card power management settings


Can anyone confirm that the following registry contains network card configurations?

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

I need to disable the options of letting the computer turn off the nic to save power.

I set

SavePowerNowEnabled = 0

Checked power management options of the card and it was still enabled, rebooted and checked but still shows enabled even though it's set to 0.

Also I found a post that setting PnPCapabilities to 24 stops the pc from turning off the nic.

When changing the checkboxes in the front end the value does change to 24. When I enable and set the value back to 0 and manually change it back to 24. The check boxes are still enabled even after a reboot. I really need it to show as disabled in the front end not just a trick that shows it enabled but doesn't actually put the nic to sleep.


Solution

  • Setting

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

    to 0x18 did the trick on reboot.