Clicking "Edit Connections..." or "Connection Information" does nothing, "More networks" is empty

[Eero]

As the summary says. From time to time Network-manager breaks and after that clicking "Edit Connections" or "Connection Information" does nothing and "More Networks" is empty even though there are several WIFI access points in the area. Rebooting the machine is a workaround for this issue.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: network-manager 0.9.4.0-0ubuntu4.1
ProcVersionSignature: Ubuntu 3.2.0-35.55-generic 3.2.34
Uname: Linux 3.2.0-35-generic x86_64
ApportVersion: 2.0.1-0ubuntu15.1
Architecture: amd64
CRDA: Error: [Errno 2] No such file or directory
Date: Sun Jan 6 16:05:03 2013
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
IpRoute:
 default via 192.168.178.1 dev wlan0 proto static
 169.254.0.0/16 dev wlan0 scope link metric 1000
 192.168.178.0/24 dev wlan0 proto kernel scope link src 192.168.178.25 metric 2
MarkForUpload: True
NetworkManager.state:
 [main]
 NetworkingEnabled=true
 WirelessEnabled=true
 WWANEnabled=true
 WimaxEnabled=true
SourcePackage: network-manager
UpgradeStatus: No upgrade log present (probably fresh install)
nmcli-dev:
 DEVICE TYPE STATE DBUS-PATH
 usb0 gsm disconnected /org/freedesktop/NetworkManager/Devices/5
 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

[Eero (eero+launchpad)]

Even changing the current Wifi connection is impossible, when this problem occurs. In addition to rebooting a simple logout and login seems to be enough to temporarily fix the issue.

[Launchpad Janitor (janitor)]

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

[Saurabh (saurabh-malhotra)]

Just wanted to add that I am using a Lenovo w520 and this bug appeared after I upgraded from 11.10 to 12.04.

I also found another work around. I can go to All Settings -> Network (or just Network from the Unity Menu) and change the wifi network from there. I can also stop and start the wifi from there.

However the network menu from the top right does pretty much nothing once this bug appears. So it appears to be a bug related more to the GUI (the wifi menu) than the actual wireless connections.