[Bug 64940] [SNA]mesa xdemo/glxdemo get black window under gnome-shell

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=64940

--- Comment #10 from Chris Wilson <chris at chris-wilson.co.uk> ---
Were you using SwapbuffersWait disable?

If so you were definitely encountering the race fixed by the attached patch
above. However, that race should also be worked around by:

commit 6f5fd772c7ca656b86394a0f036d4e0cf5b33d8e
Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Thu Jul 25 08:29:55 2013 +0100

    sna/dri: Discard the strict checking for stale bo before performing a blit

    Instead of checking that the DRI2Buffers match up with the current
    DRI2Drawable, clip the area that is being copied to the minimum extents
    of the Drawable, source and destination buffers. This ensures that we
    never read nor write beyond the extents of the allocated or visible
    regions.

    Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=67210
    Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=67305
    Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>

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