Two more bugs have been filed about this same issue. I think it's safe to confirm it.
** Bug 51131 has been marked a duplicate of this bug ** Bug 51035 has been marked a duplicate of this bug ** Changed in: xorg (Ubuntu) Status: Unconfirmed => Confirmed -- upgrade to dapper causes display slow-down https://launchpad.net/bugs/50503 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs