I'm also affected by this bug. I replaced the line with exec ltrace /usr/sbin/usb_modeswitch_dispatcher "$@" >/tmp/ltrace-$(date).txt 2>&1 &
to avoid name clashes, and, as Mathieu observed, the process exited normally (meaning that the usb modem got switched, modemmanager recognized it, and network-manager was able to use it). I'm attaching the last trace file for you to see, although now I'm not sure if it's useful or not. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/824147 Title: usb_modeswitch_[2193]: segfault at 8 ip 00007eff40eab681 sp 00007fff6a785f58 error 4 in libc-2.13.so[7eff40e29000+195000] To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/usb-modeswitch/+bug/824147/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs