[Bug 70905] display turns off with intel(0): sna_mode_redisplay: page flipping failed, disabling CRTC:3 (pipe=0)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=70905

--- Comment #1 from Chris Wilson <chris at chris-wilson.co.uk> ---
This should prevent the display turning off after the odd failure:

commit 4e0a01a7a3cf0f473c7ffae9129069086bf2fbe2
Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Sun Oct 27 15:33:13 2013 +0000

    sna: Handle transient TearFree flip failures

    If we get a pageflip fail when trying to do a TearFree update, just
    fallback to a copy (before turning off the display for complete
    failure). The rare tearing copy should mar the user experience far less.

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

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