Starting with gutsy the default agpmode for some ati cards changed, this might be the problem. Try setting it to 4 as described in bug 133192 and tell us if that fixes the problem...
-- xserver-xorg-video-ati doesnt work with radeon 8500 in Hardy (either) https://bugs.launchpad.net/bugs/222787 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs