Public bug reported: I've just upgraded to 12.04 from 11.10, and now when I connect my external monitor, either before or after login, my X session freezes up. It also seems to stop <ctrl>-<alt>-<Fkey> from letting me switch to a console.
I've attached an Xorg.log that shows me booting up with both monitors attached, and then later me logging in, after which it happens. I observed the default wallpaper being stretched across both monitors, then everthing freezes up. The OS seems to stop responding to all keypresses but I can still log in via SSH. When I log in via SSH, X is running at 100%. I did an strace on the running X process, but it doesn't look very useful. lsb_release -rd output: Description: Ubuntu 12.04 LTS Release: 12.04 uname -a Linux tehlappy 3.2.0-25-generic #40-Ubuntu SMP Wed May 23 20:30:51 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux ** Affects: xorg (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1011086 Title: X freezes after connecting external monitor To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1011086/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs