FWIW, I had the exact same problem and your python edit has fixed it. I'm on a Lenovo Thinkpad W520 with an Nvidia Quadro 1000M in Discrete Mode.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/908856 Title: Error: Unpack requires a string argument of length 4 To manage notifications about this bug go to: https://bugs.launchpad.net/disper/+bug/908856/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs