This was caused by a problem with kvm-72. I've just back-ported kvm-83 (and installed the kvm-source DKMS package to update the kernel modules) and it boots correctly.
** Changed in: linux (Ubuntu) Assignee: TJ (intuitivenipple) => (unassigned) Status: In Progress => Invalid -- BUG: soft lockup - CPU#0 stuck for 62s! https://bugs.launchpad.net/bugs/325466 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs