Don't make come over to California and poke you for the Xorg.0.log...

Created attachment 82489 [details]
x log

Video of corruption at http://youtu.be/P8TZ1py9CLk

Can reproduce with gnome-session-fallback (no effects) + claws on saucy.

Even turning off acceleration, it still happens. Ergo bug in claws.

But not in UXA. Hmm, pixmap migration.

Bisect blames commit 07926bfe507071a3d46a2ec13bb86a36bc225761
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date:   Thu Jul 11 15:28:55 2013 +0100

    sna: Remove the temporary region allocation from sna_do_copy
    
    Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

Dammit, forgot to add the regression id to the changelog.

commit 34c9b759fbab8d548108e954d55de38c6f5bec31
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date:   Tue Jul 16 19:39:37 2013 +0100

    sna: Note that borderClip region may be more than a singular box
    
    If the child is obscured, then borderClip will contain a list of valid
    boxes rather a singular extents. I thought this was covered by the
    clipList, but I was wrong.
    
    Reported-by: Jesse Barnes <jbarnes@virtuousgeek.org>
    Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=66970
    Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>