At the moment I'm trying 2.6.35-22-generic, which is a backport from Maverick in Lucid - and within a short time I had two complete crashes with reboot. So now I'm pretty sure - unfortunately this can't be resolved, or it's a new bug.
** Attachment added: "xorg log 01" https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/568103/+attachment/1782028/+files/Xorg.0.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/568103 Title: Xorg freeze lucid daily build ATI Mobility Radeon HD 4670 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs