Please try with 3.17 mainline, there might be some bugfixes missing from i915.ko. Check dmesg if you see a GPU hang mentioned there (the symptoms match)
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1434514 Title: Unity will act erratically after connecting to an external monitor [Intel Broadwell-U][8086:1616] To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1434514/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
