How to debug system freeze?

[Mulyadi Santosa]

Hi...

On Fri, Feb 24, 2012 at 02:52, Łukasz Sowa <luksow at gmail.com> wrote:
> Hi,
>
> I'm experiencing strange bug when I close lid of my laptop - system
> freezes (no reaction on keys, no response form ssh) hard and displays
> some strange colour effects. The kernel log (after reboot) shows
> nothing. My question is - how to debug it? Maybe there's a way to track
> last called kernel function or something similar?

Hm, sounds like a bug during suspend. Perhaps you can do "strace
pm-suspend". And/or enable CONFIG_DETECT_SOFTLOCKUP. And hopefully you
can pinpoint the related syscall or kernel instruction that leads to
the bug

-- 
regards,

Mulyadi Santosa
Freelance Linux trainer and consultant

blog: the-hydra.blogspot.com
training: mulyaditraining.blogspot.com