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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - i855gm: Display corruption in presence of graphics memory pressure"
href="https://bugs.freedesktop.org/show_bug.cgi?id=79843#c8">Comment # 8</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW --- - i855gm: Display corruption in presence of graphics memory pressure"
href="https://bugs.freedesktop.org/show_bug.cgi?id=79843">bug 79843</a>
from <span class="vcard"><a class="email" href="mailto:chris@chris-wilson.co.uk" title="Chris Wilson <chris@chris-wilson.co.uk>"> <span class="fn">Chris Wilson</span></a>
</span></b>
<pre>I think I nailed it,
commit e3a0e40310b6c46b2f887bc0d75b11cc06ec8fa0
Author: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>>
Date: Wed Jun 11 18:07:46 2014 +0100
sna: Fix direction flags for memmove
Under a compositor, the current deltas may invert the sense of the copy
direction, causing scrolling corruption. Simplify handling those flags
by making them invariant for the function.
Reported-by: Bruno Prémont <<a href="mailto:bonbons@linux-vserver.org">bonbons@linux-vserver.org</a>>
Bugzilla: <a class="bz_bug_link
bz_status_NEW "
title="NEW --- - i855gm: Display corruption in presence of graphics memory pressure"
href="show_bug.cgi?id=79843">https://bugs.freedesktop.org/show_bug.cgi?id=79843</a>
Signed-off-by: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>>
That should fix the scrolling. The jury is still out as for the cause of the
other type of corruption.</pre>
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