[Bug 887834] [NEW] Unable to find wireless networks after toggling wireless

[Launchpad Bug Tracker]

You have been subscribed to a public bug by Keng-Yü Lin (lexical):

I am using Ubuntu 11.10 and network-manager 0.9.1.90-0ubuntu5.

If I use either the network manager applet or the nmcli -p nm wifi
on|off command to toggle wireless on and off, wireless networks are no
longer seen even though wireless is enabled and the wireless LED is on.

My Samsung N150 netbook has the rfkill.default_state=0 parameter. I do
the following commands:

rfkill unblock wifi
nmcli -p nm wifi on
nmcli -p nm wifi off
nmcli -p nm wifi on

At this point the wireless LED is on. If I do nmcli -p dev wifi, it
shows no wireless networks. Other commands show the following:

$ nmcli -p nm wifi
================
  WiFi enabled
================
WIFI
----------------
enabled

$ rfkill list
0: samsung-wifi: Wireless LAN
 Soft blocked: no
 Hard blocked: no
1: phy0: Wireless LAN
 Soft blocked: no
 Hard blocked: no

$ nmcli -p dev
===========================================
             Status of devices
===========================================
DEVICE     TYPE              STATE
-------------------------------------------
wlan0      802-11-wireless   unavailable
eth0       802-3-ethernet    connected

wlan0 should not be unavailable. It should be disconnected.

I have to disable wireless and use the rfkill command to block/unblock
wifi to get wireless working again. I suspect this issue has been fixed
in network-manager 0.9.1.95 as there was a patch to nm-udev-manager.c
that was committed on September 30, 2011 (core: improving handling of
rfkill):

http://cgit.freedesktop.org/NetworkManager/NetworkManager/commit/?id=339229e4c698c61e20a28bfc33d8501490891427


ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: network-manager 0.9.1.90-0ubuntu5
ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
Uname: Linux 3.0.0-12-generic i686
ApportVersion: 1.23-0ubuntu4
Architecture: i386
CRDA: Error: [Errno 2] No such file or directory
Date: Tue Nov  8 18:44:22 2011
IfupdownConfig:
 auto lo
 iface lo inet loopback
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Beta i386 (20111007.1)
IpRoute:
 default via 192.168.33.1 dev eth0  proto static
 169.254.0.0/16 dev eth0  scope link  metric 1000
 192.168.33.0/24 dev eth0  proto kernel  scope link  src 192.168.33.101  metric 1
NetworkManager.state:
 [main]
 NetworkingEnabled=true
 WirelessEnabled=true
 WWANEnabled=true
 WimaxEnabled=true
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: network-manager
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: network-manager
     Importance: Unknown
         Status: Unknown

** Affects: network-manager (Ubuntu)
     Importance: Medium
         Status: Triaged


** Tags: apport-bug i386 oneiric running-unity
-- 
Unable to find wireless networks after toggling wireless
https://bugs.launchpad.net/bugs/887834
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