I tried now various combinations: Gentoo 64bit, Ubuntu 64bit, Ubuntu 32bit with drivers 8.6 and 8.7 . The result is always the same: the system freezes roughly 15 seconds into using a 3D application like glxgears or the UT2k4Demo ( that happens to be around on that disk ). It looks therefore like a permanent bug which happens across architectures and distributions.
Some ATI guy can take stand to this? Why are your drivers looking up permanently in the most vital things: 3D?
To the guys who did the benchmark ( where it obviously seems to run ), what main board are you using? How many RAM are you using? From what I gathered from the review you use a 32bit Ubuntu 8.04 . I used the exact same to be sure it is not an architecture or distribution problem.
EDIT: Are there certain BIOS options which are known to cause troubles? I've set mostly all to auto and optimal values. What else could I test to narrow down the problem?
Everything else works except the lookup. Chances are the drivers are not "safe" enough for certain situations but figuring this out would be helpful also to other people.