I also suffer from this issue. It appears to be triggered when Network manager loads. attached are my log files that all end at the hang.
** Attachment added: "syslog" http://launchpadlibrarian.net/17138675/syslog -- dell optiplex 745 hangs freeze i reboot or when i log off https://bugs.launchpad.net/bugs/255961 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs