> > I have just installed XFree86 4.1.0 (compiled from source) on my Debian (Potato) box running kernel 2.4.8. Whenever I try to run a GL program fullscreen it is very jerky. I have no problems running GL programs in a window. According to the glxinfo program DRI is set up correctly.
> I forgot to mention that I have a Voodoo Banshee.
Isn't this a very old card? ie 4mb voodoo 1?
How much memory is on that Banshee, I suspect that it may be doing AGP (is this even an AGP card?) transfers (which are very slow). Try reducing resolution / texture sizes then hopfully it wont have to visit the main memory, via the PCI / AGP bus, which is causing the jerkiness.
Could be wrong, but then I dont know the resolution / colour depth / etc that you are trying to run, or the speifics of your hardware, or the GL program.