Ok I have put some debug into the kernel and built you a test kernel. Could you install the kernel below and reproduce the issue. This hopefully will emit some clues into dmesg:
http://people.canonical.com/~apw/lp926923-precise/ -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/926923 Title: udev occasionally goes into infinite loop To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/926923/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs