Debugging a system freeze?

[Gilboa Davara]

On Sun, Jun 17, 2012 at 9:40 AM, Christopher Svanefalk
<christopher.svanefalk at gmail.com> wrote:
> Recently I have been having problems with my machine completely freezing up
> seemingly randomly. The display freezes in its current frame, and all I/O is
> completely unresponsive. It is not possible to SSH into it at this stage
> (ssh fails with a Host Unreachable error). The only remedy is a manual
> reset.
>
> I was wondering how I could go about trying to figure out what is going on?
> What log files can I look at to figure out what happened just before the
> reset etc? Would be grateful for any help.
>
> My specs are the following:
>
> Fedora 17 standard desktop version, completely updated as of June 17, 2012.
>
> i7-3930K clocked at 4.2Ghz with 1.240 vcore (stable)
> Gigabyte X79-UD7
> Nvidia GTX285 (main suspect, since it is provably broken. However, I have
> not had these problems earlier)
> SATA HDD from Seagate.
>
> --
> Best,
>
> Christopher Svanefalk

Power supply issues?
Beyond that, I'd configure lm_sensors ($ sensors-detect) and
periodically log the output of $ sensors into a log file.

- Gilboa