Just a quick and boring hardware post for those Linux users stuck with ATI video cards. Release 8.42.3 of the proprietary fglrx driver now supports AIGLX and the composite extension (which means compiz-fusion and cool desktop effects without the need for Xgl).
My own experience on Ubuntu 7.10:
- Installation relatively painless using any of these guides: one, two, three
- Performance reasonable except that (1) cube rotation a little choppy, (2) 3D GL apps flicker terribly (fix: turn off compiz)
- Much less CPU/RAM usage than when running Xgl
If you´re happy with the Xgl solution, stick with it until things improve. Some progress, at least.