I had the same issue. Ville's patch solved the problem. Thanks a lot guys. I wish you all the best!
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1239186 Title: [Lenovo ThinkPad X220] External screens shut off randomly To manage notifications about this bug go to: https://bugs.launchpad.net/xserver-xorg-video-intel/+bug/1239186/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs