I fixed this bug by update kernel to 2.6.30.1 and configure kernel by menuconfig :
Device Drivers ---> Network device support ---> USB Network Adapters ---> <*> Option USB High Speed Mobile Devices now easy detecting bandluxe c120 by network-manager as a charm :) -- system freeze when detecting bandluxe c120 modem https://bugs.launchpad.net/bugs/401541 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