I have a Radeon 9800 pro in my computer (non-laptop) and I think that I only have the problem with "switch user" when I use fglrx and when I use the free driver I instead have random lockups when running GL applications but "switch user" works.
-- Lockup problems with both the free xorg ATI driver and the proprietary fglrx driver, using various ATI cards https://launchpad.net/bugs/30447 -- kubuntu-bugs mailing list kubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs
