For some weird reasons, by deleting all configuration files in my home directory, the behavior reverted to what it was with Ubuntu 13.10. I cannot reproduce the crash anymore. I still need to add the correct resolution with xrandr as it is not detected correctly. Somehow there is a lurking bug in i915, but this must have been triggered by some weird settings I had in Unity. This is my best guess.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1314213 Title: [Lenovo ThinkPad X220] External DP1 monitor extremely unstable since upgrade to 14.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1314213/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs