This looks to be a duplicate of bug 894070. Can you please try booting with "intel_iommu=off"? Please let us know your results. Thanks.
** 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/899619 Title: 3.2.0-2 and -3 fail to boot on a thinkpad T510 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/899619/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs