xorg crashing with "Fatal server error: lockup" in xorg.log and "[drm:drm_lock_free] *ERROR* 1 freed heavyweight lock held by 2" in messages

[Zhenyu Wang]

On 2007.11.28 14:34:36 +0000, Jens Stroebel wrote:
> > conditions:
> > xorg-git (xserver, libs, drivers, mesa) from 2007-11-22
> > drm from linux 2.6.22.14
> > kernel linux 2.6.22.14
> > 
> > intel 965GM on a latitude D830
> 
> just a note:
> 
> I forgot to mention that this behavior is !not! volutarily reproducable,
> unfortunately.
> It happens very rarely and has been observed just once (with an
> identical setup running at about half a dozen places).

It seems GPU hang cause X crash. Could you fire a bug to
http://bugs.freedesktop.org? Please describe what 3D applications you
run into this problem. 

Thanks.