TNT2 M64 doesnt have S3TC extension!
I have a cheaper TNT2 M64, and I can't play or test UT3 in linux.
In windowsXP(detonator drivers), same machine, it works.
My error, is:
OpenGL renderer relies on DXTC/S3TC support.
Driver works, with Descent, or Quake, also Tux racer, xmms OpenGL Plugin....at a decent velocity, 3 or 4 (or more ) times faster than MesaGL/X11GL
But I don't have S3TC extension :___(