After a couple of tries with reinstalls from scratch ( didn't have any work on this machine, so I had nothing to lose ), I decided to try using the framebuffer option while reconfiguring X. This *seems* to have cleared up the problem, though I'm not 100% sure that I have the exact same setup as before, nor am I sure that this solution is adequate.
Will someone please assign this bug to an appropriate category? -- X hangs system on switch back https://launchpad.net/bugs/57840 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs