Finding out which devices support waking your computer from sleep mode

When your computer is sleeping, probably the most common ways to bring it back is to press a key on the keyboard, move the mouse, or press the power button of the computer. But, many different devices in the system can wake up your computer, including network cards, modems, web cameras, and so on.

Windows provides a handy command-line command for querying information about power and sleep related settings, and also to change some of them. The command is named "powercfg", and it also allows you to list all the devices that allow the computer to resume from sleep.

The command you need to run is:

powercfg -devicequery wake_armed

This will display a list of devices, as follows:

HID-compliant mouse
Standard PS/2 Keyboard

Note that the PowerCfg command supports both the forward slash and the dash/hyphen as the command separator. Thus, "/devicequery" and "-devicequery" work the same.