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[Launchpad Bug Tracker <887834@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package network-manager - 0.9.1.90-0ubuntu6

---------------
network-manager (0.9.1.90-0ubuntu6) precise; urgency=low

  * debian/patches/core-improving-handling-of-rfkill-bgo-655773.patch:
    Fix the rfkill handling with the improved block state determination
    logic among the platform driver and the non-platform driver.
    (LP: #887834)
 -- Keng-Yu Lin <kengyu@xxxxxxxxxx>   Thu, 24 Nov 2011 15:41:54 +0800

** Changed in: network-manager (Ubuntu Precise)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/887834

Title:
  Unable to find wireless networks after toggling wireless

Status in NetworkManager:
  Fix Released
Status in “network-manager” package in Ubuntu:
  Fix Released
Status in “network-manager” source package in Oneiric:
  In Progress
Status in “network-manager” source package in Precise:
  Fix Released

Bug description:
  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)

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