Comment 1 for bug 140763

Thank you for taking the time to report this bug and helping to make Ubuntu better. This bug did not have a package associated with it, which is important for ensuring that it gets looked at by the proper developers. You can learn more about finding the right package at https://wiki.ubuntu.com/Bugs/FindRightPackage . I have classified this bug as a bug in network-manager.
Additionally, it would be helpful if you could submit some log files after experiencing the crash - '/var/log/messages' and '/var/log/daemon.log' would be quite useful.