[ubuntu-x] i845 freeze fix in Lucid?

[Bryce Harrington]

On Thu, May 13, 2010 at 06:50:58AM +0200, Geir Ove Myhr wrote:
> On Wed, May 12, 2010 at 11:39 PM, Bryce Harrington <bryce at canonical.com> wrote:
> > On Wed, May 12, 2010 at 04:28:59PM -0400, Greg Bair wrote:
> >> Last month, Geir Ove Myhr posted a patch for the Intel driver to fix a
> >> freezing issue on i845 chipsets.  Bryce Harrington then mentioned adding
> >> it to Lucid.
> >
> > To clarify, IIRC the patch is the upstream "Big Hammer" patch, it's not
> > so much a "fix" as a set of tweaks and heuristics.
> 
> Nope, I think the patch in question was the clip solids patch to the
> intel DDX driver. That patch does fix some GPU hangs, and for some it
> meant that it would take longer for the computer to freeze. But the
> cache coherency problem that is the big one right now is not affected
> by this. So the clip-solids patch is included in Lucid LTS (and in
> xserver-xorg-video-intel from version 2:2.9.1-3ubuntu2 on April 13)
> but is unlikely to solve all freeze issues on 845G.

Oh that one, yeah.  There were a few minor patches we did pull in that
reputedly helped but didn't give a general solution for everyone.

Bryce