Do you have an AGP system? If so, does it help if you try some different AGPMode values? (1,2,4,8) Please check https://wiki.ubuntu.com/X/Quirks#ATI%20AGP%20Mode%20Quirk and report back if it helps.
Also, if you can, please check if you can reproduce this on Ubuntu Karmic. LiveCD's of the alpha-3 release are available from http://cdimages.ubuntu.com/
Do you have an AGP system? If so, does it help if you try some different AGPMode values? (1,2,4,8) /wiki.ubuntu. com/X/Quirks# ATI%20AGP% 20Mode% 20Quirk and report back if it helps.
Please check https:/
Also, if you can, please check if you can reproduce this on Ubuntu Karmic. LiveCD's of the alpha-3 release are available from http:// cdimages. ubuntu. com/