Comment 6 for bug 768986

This is NOT a dup of bug 727594, as it was fixed with:

http://packages.ubuntu.com/natty-updates/xserver-xorg-video-intel

<quote>
xserver-xorg-video-intel (2:2.14.0-4ubuntu7.1) natty-proposed; urgency=low

  * Add 119_disable_relaxed_fencing.patch: The relaxed fencing
    optimization is suspected as the cause for various i915/945 gpu lockup
    issues. This disables the optimization by default but adds an
    xorg.conf parameter to let people experiment with it turned on.
    (LP: #727594, #761143, #761632, #755693)

 -- Bryce Harrington <email address hidden> Fri, 22 Apr 2011 19:12:55 -0700
</quote>

and I have this update installed on my 915GAV and I *still* am getting the problem. :(