[Bug 60042] New: >=xf86-video-intel-2.20.18 built with '--enable-sna' cause flash fullscreen freezing with hard crashing Xorg

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=60042

          Priority: medium
            Bug ID: 60042
          Assignee: chris at chris-wilson.co.uk
           Summary: >=xf86-video-intel-2.20.18 built with '--enable-sna'
                    cause flash fullscreen freezing with hard crashing
                    Xorg
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: rickfharris at yahoo.com.au
          Hardware: Other
            Status: NEW
           Version: unspecified
         Component: Driver/intel
           Product: xorg

Created attachment 73886
  --> https://bugs.freedesktop.org/attachment.cgi?id=73886&action=edit
Xorg-intel_crash-debug.txt

Refer also https://bugs.gentoo.org/show_bug.cgi?id=454412

>=xf86-video-intel-2.20.18 installed with '--enable-sna' causes flash fullscreen video to freeze and sometimes crash Xorg entirely.

When the fullscreen video freezes it can be woken up by issuing some Xorg OSD
(eg.Gnome/KDE volume display) but immediately freezes afterwards.
The audio continues playing in the background, just the video freezes.

The version of Adobe Flash does not matter, tested with 11.2.202.261 and
10.3.183.50.

The version of kernel does not matter, tested with 3.4.11 and 3.7.1.

The bug occurs in multiple browsers.
Tested with Firefox, Chrome, Chromium and Opera.

Does not affect any xf86-video-intel version built with '--disable-sna'.

Using Intel® Ironlake Mobile GPU.

Bug does not occur if X11 compositing is disabled.

Xorg crash backtrace attached...

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