one thing to add: I know my solution isn't first best, but perhaps it helps someone and the developers can figure out what exactly caused the problem
-- After logging out, trying to switch user, and changing from vtty back to X system completely hangs with a black screen with ATI Mobility Radeon non-free Drivers https://bugs.launchpad.net/bugs/500056 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