Clint, Here is the file last-shutdown-lsof I obtained per your instructions. It was generated on Quantal, with "Enable Networking" unchecked before shutdown.
My list of open files looks different from Russell's one. I do not have entries for dhcp, but I do have entries for modem-manager. ** Attachment added: "last-shutdown-lsof" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1073433/+attachment/3505260/+files/last-shutdown-lsof -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1073433 Title: Ext4 corruption associated with shutdown of Ubuntu 12.10 To manage notifications about this bug go to: https://bugs.launchpad.net/upstart/+bug/1073433/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs