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Christopher James Halse Rogers committed 498548ec69c
drm: Send pending vblank events before disabling vblank. This is the least-bad behaviour. It means that we signal the vblank event before it actually happens, but since we're disabling vblanks there's no guarantee that it will *ever* happen otherwise. This prevents GL applications which use WaitMSC from hanging indefinitely. Signed-off-by: Christopher James Halse Rogers <christopher.halse.rogers@canonical.com> Signed-off-by: Dave Airlie <airlied@redhat.com>