Nvidia driver 18.104.22.16870. Affects multiple graphics card models (e.g Quadro P2200 and Quadro RTX 4000).
With this specific driver installed if the monitor goes to standby/gets turned off, the computer cannot be controlled properly. The screen goes completely black but the mouse can still be controlled. Even though you cannot see any windows you are still able to click whatever is on the client side as if you could in fact see it.
If we uninstall the Nvidia driver and reboot, the computer is fully controllable even if the monitor is in sleep/off.
Customer support service by UserEcho