I have since "solved" the problem by switching to the vesa driver. Of course, that's not a great solution, but anyway, it proves that something is really wrong with the ati driver. It is most definitely a driver issue, of that I'm certain.
-- login screen crashes https://launchpad.net/bugs/42157 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
