I would like to ask you for support in guiding me how to diagnose the following problem/situation:
system boots up ok
when I am logged into gnome/wayland, system runs well
from gdm login manager to gnome, often gets me into trouble: system simply hangs 1 out of 2 times and does not proceed/cold restart needed.
I recognise I could try to triangulate the problem by disabling all gnome extensions (for a start) and checking week by week, whether re-enabling one extension after the next correlates with the issue.
Question: which logs to check for potential hints? (and what to look for?)
The standard thing to do is to disable extensions, or even better: create a new user and see if the issue persists. This quickly tells us if the issue is a system issue or one related to the user account—sometimes configs get mangled, or extensions break, and so on. So, that’s what we suggest as a first step.
From a logs perspective, simply looking at the systemd journal immediately after the issue is most helpful. Here’s some info on looking at the logs: