[Bug 57557] [ivb] render corruption under kwin + desktop effects

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=57557

--- Comment #16 from Chris Wilson <chris at chris-wilson.co.uk> ---
Ugh, found it in the end:

commit 853588ad5be9407d2123f6055458ca84e72b8eb9
Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Sat Feb 1 21:55:09 2014 +0000

    sna: If IGNORE_CPU is not set we must mark the move as MOVE_READ

    Logic reversal in discarding CPU damage. An old bug revealed by the more
    aggressive attempts to discard CPU damage.

    Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>

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