Dear Andrew Let us try to get the ync buffer swapping to vblank work... :) RH 9.0 shipped with the latest xfree86: xfree86.4.3, which, according to Leif Delgas should make the synchronization of the swapping of OpenGL buffers with the vertical retrace signal, possible: use 'export LIBGL_SYNC_REFRESH=t'." -> do I just need to type this in the command-line as su? see also the xfree86 section in: http://www.gurulabs.com/RedHatLinux9-review.html I still get: 2003-04-29 09:26:54 (1287) info: OpenGL 1.2 Mesa 4.0.4, Mesa DRI Radeon 20020611 AGP 1x x86/MMX/SSE TCL, Tungsten Graphics, Inc. 2003-04-29 09:26:54 (1287) info: Video system reports 32 bpp (8 8 8 8 RGBA). 2003-04-29 09:26:54 (1287) WARNING: Could not sync buffer swapping to vblank because you are running linux but not known/supported drivers (only nVidia and recent Mesa DRI Radeon currently supported). thanks :) Christoph -- Christoph Lehmann <lehmann@xxxxxxxxxxxx> University Hospital of Clinical Psychiatry ====================================== The Vision Egg mailing list Archives: //www.freelists.org/archives/visionegg Website: http://www.visionegg.org/mailinglist.html