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DisplaySnooze is a tiny utility for turning your displays off while leaving the PC awake, logged in, and running normally.
If your screens turn off, then wake back up around 5 minutes later, and the same thing happens when Windows turns the display off by itself, it is probably something on the PC waking the display again rather than DisplaySnooze turning it back on.
DisplaySnooze only sends the standard Windows monitor-off command. It does not schedule wake events, does not listen for input, does not use the network, and does not change power settings.
The default Windows guard window is 180 seconds. If something wakes the display after 5 minutes, DisplaySnooze has already exited by then. As a workaround, try a longer guard window:
.\DisplaySnooze.exe 600 5That keeps nudging the monitors off for 10 minutes, every 5 seconds. It can help with a delayed wake, but it does not fix the root cause.
Common causes include:
- A mouse, keyboard, controller, USB hub, dock, or Bluetooth device sending input.
- A network adapter or scheduled wake timer waking the computer from sleep.
- Remote desktop, streaming, media, or display-management software.
- A monitor or GPU re-detecting inputs after the display powers down.
- Windows maintenance tasks if the whole PC is sleeping, not just the displays.
Useful Windows checks:
powercfg /requests
powercfg /lastwake
powercfg /waketimers
powercfg -devicequery wake_armedFor more detail, see Troubleshooting.
On Windows, DisplaySnooze sends:
WM_SYSCOMMAND / SC_MONITORPOWER / 2
By default, it:
- Turns the displays off immediately.
- Repeats the display-off command every 4 seconds.
- Stops after 3 minutes.
- Leaves the PC awake.
- Leaves apps running.
- Does not lock, log out, sleep, hibernate, shut down, or change power settings.
- Does not install a service or add itself to startup.
- Does not use the network.