This is still a problem on edgy (at least under xubuntu): it hangs the machine when you reboot into the newly installed OS. I had to boot from another partition and edit xorg.conf to remove the dri line before I could use edgy.
-- X server (S3 Savage) freezing with DRI https://launchpad.net/bugs/41340 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs