Ok, so this turns out to be triggered by enabling texture compression in CCSM. When I turn that on I can reproduce horrible, horrible failure on display size change (With a HSW Iris Pro 5200).
** Changed in: compiz (Ubuntu) Status: New => Confirmed ** Changed in: compiz (Ubuntu) Importance: Undecided => Medium -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1293081 Title: black screen or frozen screen after a change in multihead configuration To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/1293081/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs