I recently tested dapper final release on a t22 and had not problems there (with or without dock). So is this still a issue for you in dapper/final?
** Changed in: Ubuntu Status: Unconfirmed => Needs Info -- Thinkpad T22 - X.org/GDM freeze GPU when docked (Flight 6 +) https://launchpad.net/bugs/39333 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs