That confirms that pageflipping is the direct cause of the hangs. Very recently suspicion has been raised that the gen4 pageflipping irq handling may be racy - which would help explain why all the reports of this hang I've seen so far have been gen4.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1116587 Title: Lenovo T400: With external monitor the system is rarely working for more than 10 minutes To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/1116587/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
