Hi, even with LIBGL_SYNC_REFRESH I get bad tearing with quake2. I looked into the source a bit and now I'm scratching my head about this question: Does waiting for a vblank do anything useful if you havn't flushed the 3D hardware graphics pipeline before? I believe the driver should call something equivalent to glFinish before driWaitForVBlank if LIBGL_SYNC_REFRESH is set.
Further in case of a non-zero swap interval you will throttle the frame rate but there is no guarantee that the swap will occur during a retrace if the application or the driver havn't called glFinish. I guess applications explicitly using swap intervals are aware of that. But LIBGL_SYNC_REFRESH is supposed to work for applications that don't even know they are waiting for a vblank. So the driver should call glFinish for them. I hope I'm not completely off with my theories ;-) Regards, Felix ------------ __\|/__ ___ ___ ------------------------- Felix ___\_e -_/___/ __\___/ __\_____ You can do anything, Kühling (_____\Ä/____/ /_____/ /________) just not everything [EMAIL PROTECTED] \___/ \___/ U at the same time. ------------------------------------------------------- This SF.net email is sponsored by: Etnus, makers of TotalView, The best thread debugger on the planet. Designed with thread debugging features you've never dreamed of, try TotalView 6 free at www.etnus.com. _______________________________________________ Dri-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/dri-devel
