[Bug 57945] New: [sna GM45] Xorg freezes when using gnome shell

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=57945

          Priority: medium
            Bug ID: 57945
          Assignee: chris at chris-wilson.co.uk
           Summary: [sna GM45] Xorg freezes when using gnome shell
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: pavel.ondracka at email.cz
          Hardware: Other
            Status: NEW
           Version: git
         Component: Driver/intel
           Product: xorg

Created attachment 71081
  --> https://bugs.freedesktop.org/attachment.cgi?id=71081&action=edit
dmesg

When I compile xf86-video-intel with sna and using gnome shell it sometimes
freezes the whole Xserver. This happens approx once a day of normal usage and
so far I haven't found a reliable way to reproduce (just move windows between
workspaces a lot, maybe with opengl apps it may freeze faster but not sure). I
can't do anything, even switching to console doesn't work, however I can still
ssh in. All my attempts to obtain a backtrace through ssh were unsuccessful.
When i try to attach to X with gdb, it just freezes, the same happens when I'm
already attached to it at the moment of incident. There is some interesting
info in the dmesg. Also attaching Xorg log. (Logs are few days old, however the
incident just happened toady with bleeding edge stack).
BTW I was using UXA with no problems for a week. SNA lasts at most for 2 days.

GPU: GM45
Kernel: 3.6.8-2.fc17.x86_64
xf86-video-intel: 626dd1324dd2c5b14ca4aff598b5eb1e45550e69
mesa: cff4c94
libdrm: 171666e4b8127c17c68ea0d44cf4e81ec342f2d0
X.org: 1.12.4

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