I had the described problem on my Lenovo Thinkpad X201 Tablet; it seems that the patch from #32 solved it.
Linux ulf-tab 3.0.0-12-generic #20-Ubuntu SMP Fri Oct 7 14:56:25 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux upstart (1.3-0ubuntu12~bug829980) oneiric; urgency=low -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/829980 Title: upstart-udev-bridge eats 100% cpu calling dbus_message_iter_append_basic() To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/829980/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs