I’m having these, too. nvidia-modeset/: page allocation failure, not kwin or xorg as others experienced. I was moving files from an external HDD to another when suddenly at least everything visual froze, music did stop too though. Doing Ctrl+alt+f2 and then f1 did help a couple of times, but after the third or fourth time it didn’t. My monitors reported no signal and I had to reset the PC yet again.
Here’s (yet another) kernel log of the problem.
The second one is from after I was able to recover a few times through ctrl+alt+f1/f2 switching. It happened the moment I was trying to start an application (Discord). Looks like x11 completely broke down then.
kernel1.log (12.6 KB) kernel2.log (27.6 KB)
Glad to see you’re aware of this issue, I hope it gets fixed quickly, it’s quite severe.