[Bug 73842] Haswell: lock screen disappears temporarily after dmps force off/on (laptop lid close/open)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=73842

--- Comment #12 from Chris Wilson <chris at chris-wilson.co.uk> ---
commit 2c441079cbd52902d356b652659e2be84726940e
Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Tue Jan 21 10:17:03 2014 +0000

    sna: Initialise the TearFree shadow output from the current front buffer

    Otherwise we may end up in a sitation where we show stale contents for a
    (sometimes signification) fraction of a second before it is refreshed
    with the correct contents.

    Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=73842
    Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>

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