Thanks for your report. I think it would be a good idea if you can attach your /var/log/Xorg.0.log and /etc/X11/xorg.conf to this report as file attachments.
Note: I added xorg-ati but did not remove kernel (while assigning bugs) upon your last comments. The reason is, afaik, if a driver (or anything, for that matter) can hang the machine, it's a kernel bug. But at the same time, it's an ati bug bc it cannot provide support your specific card. I hope this info will be helpful to other triagers / developers looking a this bug. ** Also affects: xserver-xorg-video-ati (Ubuntu) Importance: Undecided Status: Unconfirmed -- Kubuntu Edgy (release) hangs on boot https://launchpad.net/bugs/68497 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs