
If we manually wait for the VBLANK with: - SGI_video_sync - Direct usage of the DRM ioctl Then we should call glFinish() first, or otherwise the swap-buffers may be delayed by pending drawing and cause a tear. http://bugzilla.openedhand.com/show_bug.cgi?id=1636 Signed-off-by: Emmanuele Bassi <ebassi@linux.intel.com>