Comment 37 for bug 2059847

Probably not related, but "nvidia-driver-535" was mentioned above in a post. I'm now using ppa:vanvugt/mutter and it seems to be fine, but apt also upgraded nvidia driver from 525 to 535 (maybe not related at all just the new nvidia driver was presented now?). Since then I have hard lock-ups on my system what I've never seen before (no keyboard and mouse works). After forced power-off I see this in the kernel log file:

Apr 5 15:42:57 rygel kernel: [ 3282.354685] NVRM: GPU at PCI:0000:01:00: GPU-78091d7e-2007-c450-19a1-f764cae07b00
Apr 5 15:42:57 rygel kernel: [ 3282.354689] NVRM: Xid (PCI:0000:01:00): 79, pid='<unknown>', name=<unknown>, GPU has fallen off the bus.
Apr 5 15:42:57 rygel kernel: [ 3282.354691] NVRM: GPU 0000:01:00.0: GPU has fallen off the bus.
Apr 5 15:42:57 rygel kernel: [ 3282.354730] NVRM: A GPU crash dump has been created. If possible, please run
Apr 5 15:42:57 rygel kernel: [ 3282.354730] NVRM: nvidia-bug-report.sh as root to collect this data before
Apr 5 15:42:57 rygel kernel: [ 3282.354730] NVRM: the NVIDIA kernel module is unloaded.
Apr 5 15:43:02 rygel kernel: [ 3287.474709] NVRM: Error in service of callback
Apr 5 15:48:05 rygel kernel: [ 3590.071558] Asynchronous wait on fence NVIDIA:nvidia.prime:11cbb timed out (hint:intel_atomic_commit_ready [i915])

I've never seen anything similar before, though I have this very system/install with nvidia's driver since more than a year or so. Since it's probably a totally different issue (though I am not 100% sure), I've reported here: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-535/+bug/2060303

It seems now this hard lock up occurs several times per day :( Though the terminal slowness/keyboard input lag/etc is gone, which is good, of course!