[Bug 58005] [DRI2] race between compositor and clients when using SwapBuffer exchanges

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Mon Dec 10 15:23:55 PST 2012


https://bugs.freedesktop.org/show_bug.cgi?id=58005

Chris Wilson <chris at chris-wilson.co.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|medium                      |low
            Summary|[G45 SNA] objects           |[DRI2] race between
                   |flickering in warzone2100   |compositor and clients when
                   |when in fullscreen mode     |using SwapBuffer exchanges

--- Comment #10 from Chris Wilson <chris at chris-wilson.co.uk> ---
As no one has reviewed my xorg patches to reduce the race, time to hack the
ddx:

commit 162e9a2bfc693db186aa481551cf76b3dc5ee55c
Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Mon Dec 10 23:11:48 2012 +0000

    sna/dri: Disable name exchanges for SwapBuffers

    The DRI2 protocol is inherently racy. Fortuituously, this can be swept
    under the carpet by forcing the serialisation between the DRI2 clients
    by using a blit for the SwapBuffers.

    References: https://bugs.freedesktop.org/show_bug.cgi?id=58005
    Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>

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