How to programmatically control "Allow the computer to turn off this device to save power" setting?

NTDEV
1

Hi,

When a driver supports GUID_POWER_DEVICE_ENABLE class GUID, Windows enables the Power Management tab for a driver and presents user a checkbox to disable the option.

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How I can set this checkbox programmatically? I believe the setting works so that WMI sends relevant requests to the driver and the driver stores the setting in its specific way. There is no well known register key to access and I’m not aware of any user space API to issue these settings. WMI Win32_PnPEntity does not give access to this setting I believe.

Reason I need to do this is that our setup is experiencing random instability and lock ups with some USB devices when this setting is enabled. When disabled these problems disappear.

2

This user has experimented with MSPower_DeviceEnable class How do I make a powershell script to set a HID device power saving option? - Stack Overflow. The sample PowerPerDevice.cpp requires a TARGET_INSTANCE_ID based on DeviceInstance. One caveat is that backslashes must be doubled in the WMI query. The WMI instance has “_0” appended. To see the matches, use pwsh

Get-CimInstance -Namespace root/WMI -Query "SELECT * FROM MSPower_DeviceEnable WHERE InstanceName LIKE 'PCI%'"