My dmesg showed similar things:
[161749.412787] modem-manager[27128]: segfault at 0 ip b76588b0 sp bfe6f804 error 4 in libglib-2.0.so.0.3200.3[b75e6000+f7000] [161749.479920] init: modemmanager main process (27128) killed by SEGV signal [161749.479939] init: modemmanager main process ended, respawning I'm using Huawei E1550/E1800 with Kubuntu 12.04. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to glib2.0 in Ubuntu. https://bugs.launchpad.net/bugs/1043246 Title: modem manager crashes with SIGSEGV (Lubuntu 12.04) Status in “glib2.0” package in Ubuntu: New Bug description: Modem manager correctly recognizes my GSM modem, but crashes while attempting to connect. syslog reports "modem-manager[1957]: segfault at 0 ip 0024a8b0 sp bfedf424 error 4 in libglib-2.0.so.0.3200.3[1d8000+f7000]" Distribution: Lubuntu 12.04 (32-bit) Modem: Huawei E1550 The bug is persistent. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/glib2.0/+bug/1043246/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp