Bug#637958: X.org crash leaves GPU in an inconsistent state and renders system unbootable

[Martin]

On Thu, 2011-08-18 at 13:10 +0200, Cyril Brulebois wrote:
> Martin <mjb at cs.bath.ac.uk> (18/08/2011):
> > The instructions work but the packages will not install due to a
> > dependency problem.  If I understand correctly what's happening is:
> > 
> > *. Part of the xorg core breaks *-video-6
> 
> Because src:xorg has not reached squeeze-backports yet. Uploaded a few
> hours ago (src:xorg needed to reached testing before it could be
> backported, hence the delay compared to mesa, xorg-server, and drivers).
> 

Right; have upgraded to the latest X.org and kernel in backports and the
problem still persists.  Something causes the machine to hang while
bieng used interactively in X and after this loading the kernel psmouse
module hangs the machine.

What should I try next?  Should I move this to being a kernel bug?

Cheers,
 - Martin