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[Frantique <undernetangel@xxxxxxxxx>]

Last good version is in Ubuntu 12.04.5.

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https://bugs.launchpad.net/bugs/1178841

Title:
  [regression] iwl3945 0000:04:00.0: Radio disabled by HW RF Kill switch
  - wpa_supplicant causes high cpu load -

Status in “linux” package in Ubuntu:
  Confirmed
Status in “wpa” package in Ubuntu:
  Confirmed

Bug description:
  On this notebook wifi sometimes doesn't work (wifi led not on, no wlan0 device), this issue was already present in 12.10, but aside from the non-working wifi, nothing bad™ happened in this condition.
  After updating to 13.04 however, dmesg gets spammed by repeated messages 

  May 10 23:28:09 piBook kernel: [   21.048718] iwl3945 0000:04:00.0: Radio disabled by HW RF Kill switch
  May 10 23:28:09 piBook kernel: [   21.048842] iwl3945 0000:04:00.0: Radio disabled by HW RF Kill switch
  May 10 23:28:09 piBook kernel: [   21.049636] iwl3945 0000:04:00.0: Radio disabled by HW RF Kill switch
  May 10 23:28:09 piBook kernel: [   21.049763] iwl3945 0000:04:00.0: Radio disabled by HW RF Kill switch
  May 10 23:28:09 piBook kernel: [   21.051079] iwl3945 0000:04:00.0: Radio disabled by HW RF Kill switch
  May 10 23:28:09 piBook kernel: [   21.051378] iwl3945 0000:04:00.0: Radio disabled by HW RF Kill switch
  May 10 23:28:09 piBook kernel: [   21.052369] iwl3945 0000:04:00.0: Radio disabled by HW RF Kill switch
  May 10 23:28:09 piBook kernel: [   21.052499] iwl3945 0000:04:00.0: Radio disabled by HW RF Kill switch
  May 10 23:28:09 piBook kernel: [   21.053323] iwl3945 0000:04:00.0: Radio disabled by HW RF Kill switch
  May 10 23:28:09 piBook kernel: [   21.053452] iwl3945 0000:04:00.0: Radio disabled by HW RF Kill switch
  May 10 23:28:09 piBook kernel: [   21.054252] iwl3945 0000:04:00.0: Radio disabled by HW RF Kill switch
  May 10 23:28:09 piBook kernel: [   21.054374] iwl3945 0000:04:00.0: Radio disabled by HW RF Kill switch
  May 10 23:28:09 piBook kernel: [   21.055140] iwl3945 0000:04:00.0: Radio disabled by HW RF Kill switch

  a side effect of this is that now wpa_supplicant causes high CPU load,
  rendering the device almost unusable.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.04
  Package: wpasupplicant 1.0-3ubuntu1
  ProcVersionSignature: Ubuntu 3.8.0-19.30-generic 3.8.8
  Uname: Linux 3.8.0-19-generic x86_64
  ApportVersion: 2.9.2-0ubuntu8
  Architecture: amd64
  Date: Fri May 10 23:32:16 2013
  InstallationDate: Installed on 2013-03-05 (66 days ago)
  InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
  MarkForUpload: True
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=de_DE.UTF-8
   SHELL=/bin/bash
  SourcePackage: wpa
  UpgradeStatus: Upgraded to raring on 2013-04-25 (15 days ago)

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