Some more details on my setup and investigations. The problem is 100% reproducable for me on a Dell Latitude D520. I have narrowed it down as follows:
Boot machine then switch to text console before logging in Login in text mode as root /etc/init.d/gdm stop /etc/dbus-1/event.d/26NetworkManagerDispatcher stop shutdown most other services (ps -ef output showing processes remaining in attached file) strace -p <PID OF NM> -f 2> /var/log/nmstrace.log & do a ALT-SysRq t to dump kernel threads before hang to syslog kill -15 <PID OF NM> system now hangs after a couple of seconds: No more console echo Cannot switch virtual consoles Cannot connect or use existing SSH sessions Cannot ping machine do another ALT-SysRq t to dump kernel threads after hang to syslog ALT-SysRq s (sync disks) ALT-SysRq b (reboot) Attached is an archive with the logfiles from all this. ** Attachment added: "Log files from network manager hang" http://launchpadlibrarian.net/11867220/NM-HANG-183568.tgz -- Gutsy network-manager causes OS to freeze on system restart or power down https://bugs.launchpad.net/bugs/183568 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
