How to debug system freeze?

[Srivatsa Bhat]

On Fri, Feb 24, 2012 at 1:22 AM, 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?
>
>
Maybe you can try the pm_test framework (see Documentation/power/basic-pm-
debugging.txt) to narrow down the problem.

Regards,
Srivatsa S. Bhat
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