I'm on Ubuntu 22.04 LTS and from time to time it happens that the system freezes completely. No input works (escape, ctrl + alt + delete, etc.), no app reacts. The only way out is to forcefully reboot my PC. How can I figure out the root cause for this? Any logs that I can check?
Apps that are typically running when this happens: Vivaldi, Discord, Spotify, sometimes also Steam or Heroic Launcher. I built my PC back in November and I did a full pass of memtest86 with XMP activated, so I don't think it's my memory. Though I can check again if that could help. And the NVME SSD is new as well with plenty of space.