This issue seems to be related to the inability of the latest kernels to support my mobile modem a Sierra Wireless 312u.
The Modem works fine on Kernel 3.2.0-58-generic #88-Ubuntu SM eg on 12.04 kernels prior to the recent 3.11 update
The modem was plugged in at boot time and once the boot sequence reached the desktop the crash message appeared
Distributor ID: Ubuntu
Description: Ubuntu Trusty Tahr (development branch)
Release: 14.04
Codename: trusty
Linux kylea-hpxt 3.11.0-15-generic #23-Ubuntu SMP Mon Dec 9 18:17:04 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
ProblemType: Crash
DistroRelease: Ubuntu 14.04
Package: network-manager 0.9.8.8-0ubuntu1
ProcVersionSignature: Ubuntu 3.11.0-15.23-generic 3.11.10
Uname: Linux 3.13.0-11-generic x86_64
ApportVersion: 2.13.2-0ubuntu5
Architecture: amd64
Date: Thu Feb 20 23:51:22 2014
ExecutablePath: /usr/sbin/NetworkManager
IfupdownConfig:
# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback
InstallationDate: Installed on 2013-03-22 (335 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Alpha amd64 (20130319)
IpRoute:
default via 192.168.1.1 dev wlan0 proto static
192.168.1.0/24 dev wlan0 proto kernel scope link src 192.168.1.142 metric 9
NetworkManager.state:
[main]
NetworkingEnabled=true
WirelessEnabled=true
WWANEnabled=true
WimaxEnabled=true
ProcCmdline: NetworkManager
ProcEnviron:
LANGUAGE=en_AU:en_GB:en
TERM=linux
PATH=(custom, no user)
LANG=en_AU.UTF-8
Signal: 6
SourcePackage: network-manager
StacktraceTop:
g_assertion_message () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
g_assertion_message_expr () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
?? ()
?? ()
g_closure_invoke () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
Title: NetworkManager crashed with SIGABRT in g_assertion_message()
UpgradeStatus: Upgraded to trusty on 2013-08-28 (176 days ago)
UserGroups:
nmcli-dev:
DEVICE TYPE STATE DBUS-PATH
ttyUSB2 gsm disconnected /org/freedesktop/NetworkManager/Devices/2
wlan0 802-11-wireless connected /org/freedesktop/NetworkManager/Devices/1
eth0 802-3-ethernet unavailable /org/freedesktop/NetworkManager/Devices/0
nmcli-nm:
RUNNING VERSION STATE NET-ENABLED WIFI-HARDWARE WIFI WWAN-HARDWARE WWAN
running 0.9.8.8 connected enabled enabled enabled enabled disabled
"UpgradeStatus: Upgraded to trusty on 2013-08-28 (176 days ago)" uhm not correct - approx 5 weeks ago !