This problem appers to me again as well. The behaviour is exactly as described by Andre in the previous comment.
For this reason I set this bug into the confirmed status. The nm-applet could not be considered as stable in the current stable ubuntu distribution (15.04). ** Changed in: network-manager-applet (Ubuntu) Status: Incomplete => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1458340 Title: nm-applet crashs with segmentation fault (Cannot grab information for modem at /org/freedesktop/ModemManager1/Modem/7: No ModemManager support) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/network-manager-applet/+bug/1458340/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs