I've attached an image of my BIOS information for those interested. Again, I only experience the problem when I connect and then disconnect an external monitor from the VGA port.
** Attachment added: "bios" https://bugs.launchpad.net/ubuntu/+source/linux-lts-backport-natty/+bug/812638/+attachment/2285044/+files/IMAG0184.jpg -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/812638 Title: video problems with Thinkpad T420s integrated intel graphics To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-lts-backport-natty/+bug/812638/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs