Can you get the syslog while booting with drm.debug=6 added to the kernel command line? That should get more information about the modeset failure.
** Changed in: linux (Ubuntu) Assignee: (unassigned) => Maarten Lankhorst (mlankhorst) ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1315369 Title: Log in not available after lock screen with multi-monitor To manage notifications about this bug go to: https://bugs.launchpad.net/unity/+bug/1315369/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs