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Chris Wilson authored
If we are not careful, we may process an unflip in the middle of resizing the frontbuffer - when the ScreenPixmap state is ill-defined. First flush all the pending flip events, cancel any residual unflips, then update the screen pixmap. This should be enough to close the race. References: https://bugs.freedesktop.org/show_bug.cgi?id=98855#c11 Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
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