Can't add new WiFi network from lightdm greeter

[Dariusz Gadomski]

1) Release: affects Trusty and Utopic (at least)
2) Affected version: 0.9.8.8-0ubuntu7

Steps to reproduce:
1. Logout to the lightdm greeter.
2. Using the network manager applet try to connect to a new network (not connected before).

Expected result:
New network connection will be configured.

Actual result:
An error dialog appears:
"Failed to add/activate connection (32) Insufficient privileges)"

ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: network-manager-gnome 0.9.8.8-0ubuntu7
ProcVersionSignature: Ubuntu 3.16.0-25.33hf73386v20150206b1-generic 3.16.7
Uname: Linux 3.16.0-25-generic x86_64
ApportVersion: 2.14.7-0ubuntu8.2
Architecture: amd64
CurrentDesktop: Unity
Date: Thu Feb 12 16:15:47 2015
IfupdownConfig:
 # interfaces(5) file used by ifup(8) and ifdown(8)
 auto lo
 iface lo inet loopback
InstallationDate: Installed on 2014-11-15 (89 days ago)
InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
IpRoute:
 default via 192.168.0.1 dev wlan0 proto static
 192.168.0.0/24 dev wlan0 proto kernel scope link src 192.168.0.16 metric 9
NetworkManager.state:
 [main]
 NetworkingEnabled=true
 WirelessEnabled=true
 WWANEnabled=true
 WimaxEnabled=true
SourcePackage: network-manager-applet
UpgradeStatus: No upgrade log present (probably fresh install)
nmcli-con:
 NAME UUID TYPE TIMESTAMP TIMESTAMP-REAL AUTOCONNECT READONLY DBUS-PATH
 UPC0051979 f40abe47-0ded-433a-9874-4d0f998de9e1 802-11-wireless 1423753892 czw, 12 lut 2015, 16:11:32 yes no /org/freedesktop/NetworkManager/Settings/2
 AndroidAP ef4fcd32-af0a-4365-b74b-7a4d269b7c59 802-11-wireless 1419528682 czw, 25 gru 2014, 18:31:22 yes no /org/freedesktop/NetworkManager/Settings/1
 SAGEM_F999 f3514b94-3a97-43e3-adb2-17492d1e6840 802-11-wireless 1419719266 sob, 27 gru 2014, 23:27:46 yes no /org/freedesktop/NetworkManager/Settings/0
nmcli-dev:
 DEVICE TYPE STATE DBUS-PATH
 wlan0 802-11-wireless connected /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

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.