After some searching, I found this thread that seems very similar to my issue:
SuSE 11.1 freezes after some seconds - openSUSE Forums
The difference is that I can SSH into my machine and, for instance, successfully execute telinit to reboot or just restart X (telinit 3; telinit 5). I am completely unsure as to what might be causing this issue. Some potentially relevant information:
- When the freeze happens, it appears that it is only the X interface that freezes. No keyboard commands work, and mouse clicks do nothing, but programs already running continue to run unabated (e.g. a flash video in a browser window, or top in a terminal window).
- By running top in anticipation of a freeze, I was able to get an idea of what processes were running at the time of the freeze. Unfortunately it didn’t show much: first top seemed to freeze for a few seconds, after which it continued to operate as normal, but didn’t show any processes as using more than 1% of the CPU.
- All freezes happen under light load, appear to be highly random and unrelated to anything specific I am doing at the time.
- I am able to press the power button to bring up the shutdown menu to perform a clean shutdown (I can’t actually interact with the shutdown menu, but once it pops up, it shuts down one minute later). No other buttons that I have tried seem to do anything after the freeze has occurred.
- My system is OpenSUSE 11.1 running Gnome with all updates installed.
Any ideas for a way to diagnose this issue and, hopefully, fix it?