Comment 18 for bug 410386

Rob, the unplugging freeze/panic was reported seperately here:

https://bugs.launchpad.net/ubuntu/+source/network-manager-applet/+bug/412605

Could you please post a log of your debug results from following these steps:

1) Stop NetworkManager
2) run /usr/sbin/modem-manager --debug
3) Start NetworkManager
4) Plug in your modem

And tell us what log output ModemManager spews out.