Comment 0 for bug 1124803

NetworkManager does not respond to SIGTERM when started in daemon mode, as upstart does by default. This also happens when running NetworkManager manually from the command line.

This was reported upstream and was fixed by commit
  64342a313ef497fca8a4fb7567900d4a1460065f

It appears that this bug forces upstart to SIGKILL NetworkManager during shutdown, which, amoung other things, means that n-m doesn't deconfigure network interfaces as intended. This bug, along with bug 1124789 (in wpasupplicant), means that no attempt is made to disconnect from a wifi network during shutdown. This in turn triggers a bug in my BIOS which causes this system to hardlock in the middle of BIOS post when I reboot while still connected to a wifi network:
  http://thread.gmane.org/gmane.linux.kernel.wireless.general/102862

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: network-manager 0.9.6.0-0ubuntu7
ProcVersionSignature: Ubuntu 3.5.0-24.37-generic 3.5.7.4
Uname: Linux 3.5.0-24-generic x86_64
ApportVersion: 2.6.1-0ubuntu10
Architecture: amd64
Date: Wed Feb 13 22:32:52 2013
IpRoute:
 default via 10.179.201.1 dev eth0 proto static
 10.179.201.0/24 dev eth0 proto kernel scope link src 10.179.201.80 metric 1
 10.179.201.0/24 dev wlan0 proto kernel scope link src 10.179.201.105 metric 9
 169.254.0.0/16 dev eth0 scope link metric 1000
MarkForUpload: True
NetworkManager.state:
 [main]
 NetworkingEnabled=true
 WirelessEnabled=true
 WWANEnabled=true
RfKill:
 0: phy0: Wireless LAN
  Soft blocked: no
  Hard blocked: no
SourcePackage: network-manager
UpgradeStatus: Upgraded to quantal on 2012-10-20 (116 days ago)
WpaSupplicantLog:

mtime.conffile..etc.NetworkManager.NetworkManager.conf: 2012-03-21T22:57:56
nmcli-dev:
 DEVICE TYPE STATE DBUS-PATH
 wlan0 802-11-wireless connected /org/freedesktop/NetworkManager/Devices/1
 eth0 802-3-ethernet connected /org/freedesktop/NetworkManager/Devices/0
nmcli-nm:
 RUNNING VERSION STATE NET-ENABLED WIFI-HARDWARE WIFI WWAN-HARDWARE WWAN
 running 0.9.6.0 connected enabled enabled enabled enabled enabled