This happens to me too, but with Ubuntu 20.04. It started shortly after the latest nvidia-graphics-driver-470 update. Symptoms are:
* graphical output freezes completely
* no reaction to any kind of input (no switching to tty either)
* ssh works and shows Xorg as using 100% CPU
* Xorg process can't be killed
* shutdown command is not executed (only ssh connection is terminated)
My GPU: GTX970. I've never had this problem before, although my PC is has not been modified for years. Now it happens multiple times per day!
This happens to me too, but with Ubuntu 20.04. It started shortly after the latest nvidia- graphics- driver- 470 update. Symptoms are:
* graphical output freezes completely
* no reaction to any kind of input (no switching to tty either)
* ssh works and shows Xorg as using 100% CPU
* Xorg process can't be killed
* shutdown command is not executed (only ssh connection is terminated)
My GPU: GTX970. I've never had this problem before, although my PC is has not been modified for years. Now it happens multiple times per day!