Network manager occasionally does not display list of available WLAN's

[Marco Ceresa]

Occasionally (behaviour seems random, I can't reproduce it) network-manager does not display a list of available WLAN's.

It succesfully connects to the pre-defined WLAN, and everything works fine, but clicking on the network-manager icon only shows up the "Enable networking", "Enable wireless", "Connection information" and "Edit connections" menus.

As a result, it is not possible to disconnect and connect to another WLAN.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: network-manager 0.9.4.0-0ubuntu4
ProcVersionSignature: Ubuntu 3.2.0-24.38-generic 3.2.16
Uname: Linux 3.2.0-24-generic i686
ApportVersion: 2.0.1-0ubuntu7
Architecture: i386
CRDA:
 country CH:
  (2402 - 2482 @ 40), (N/A, 20)
  (5170 - 5250 @ 40), (N/A, 20)
  (5250 - 5330 @ 40), (N/A, 20), DFS
  (5490 - 5710 @ 40), (N/A, 27), DFS
Date: Wed May 16 09:43:38 2012
IfupdownConfig:
 auto lo
 iface lo inet loopback
InstallationMedia: Ubuntu-Netbook 10.04 "Lucid Lynx" - Release i386 (20100429.4)
IpRoute:
 default via 172.25.7.254 dev wlan0 proto static
 169.254.0.0/16 dev wlan0 scope link metric 1000
 172.25.0.0/21 dev wlan0 proto kernel scope link src 172.25.4.100 metric 2
NetworkManager.state:
 [main]
 NetworkingEnabled=true
 WirelessEnabled=true
 WWANEnabled=true
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: network-manager
UpgradeStatus: Upgraded to precise on 2012-04-27 (18 days ago)
nmcli-dev:
 DEVICE TYPE STATE DBUS-PATH
 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 0.9.4.0 connected enabled enabled enabled enabled disabled

[Launchpad Janitor (janitor)]

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

[Michele Dall'Arno (michele-dallarno)]

Maybe a duplicate of #986920 and #993964?