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
I was still getting this last week. Following recommendation from a
colleague I disabled the Intel VT-d setting in the BIOS
(Security/Virtualisation) and the hang at udevd no longer occurs and
startup is successful.
Thinkpad W520, 12.10 64-bit, 3.5.0-22-generic #34-Ubuntu SMP Tue Jan 8
21:47:00
