Following a comment in an apparently related bug (https://bugs.launchpad.net/ubuntu/+source/linux/+bug/776999), I also tried "nox2apic" in the /etc/default/grub and re-enabled VT-d. This also works and isn't as extreme as turning acpi off completely.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1047688 Title: Boot fails on udev if USB devices are present To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1047688/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
