I have a desktop PC with a NVIDIA GTX 570 running the proprietary driver.
A game froze, I had to forcibly shut down the PC. I restarted it, then X started but became extremely unresponsive. I had to shut it down forcibly again. I tried to uninstall the proprietary NVIDIA driver and put Nouveau back but to no avail. Manually running
startx says there are no displays connected (despite having 2 working monitors, and the command line looking and working fine).
Now, I’m not able to use KDE at all anymore, only the command line works (through Ctrl+Alt+F1). I tried the fallback mode but it’s stuck at a gray blinking cursor (just like the default X screen is, when using Nouveau).
I did not run any particular update before that issue, so I don’t think there is a regression due to an update.
Is it possible to either reinstall the NVIDIA driver and get it to work, or at least switch to Nouveau in the meantime?