This exact bug seems to happen on a Dell M3800 Laptop with Haswell graphics.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1292467 Title: Dual screen greeter can break 3D acceleration To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-release-notes/+bug/1292467/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs