For anyone for whom the above solutions didn't work, passing "reboot=pci" as described in this page solved the problem for me http://serverfault.com/questions/126571/system-hangs-while-rebooting-on-debian this appears to be related to acpi issues in the bios; the solutions above did not work for me. (Disclaimer: this was on linux-mint (no, not the debian version), not ubuntu. However the bug was identical).
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/869635 Title: long delay at shutdown/reboot - network-manager doesn't close correctly To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/isc-dhcp/+bug/869635/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
