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[andre <andre_cte2010@xxxxxxxxxxx>]

At Brazil also happens this unfortunately.
I have Ubuntu 14.04 and my network is at channel 13 and it's impossible
i change the channel,
 a have tried using:
options cfg80211 ieee80211_regdom=EU
With 'EU' 'UK', 'BR' and other methods that i have found on the 
internet but nothing have work,
while this I have to continue using Windows.

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https://bugs.launchpad.net/bugs/288401

Title:
  Various wireless drivers don't see !US wireless channels on UK laptop
  [intrepid regression]

Status in Release Notes for Ubuntu:
  Fix Released
Status in “linux” package in Ubuntu:
  Fix Released
Status in “linux-backports-modules-2.6.28” package in Ubuntu:
  Confirmed
Status in “linux” source package in Intrepid:
  Won't Fix
Status in “linux-backports-modules-2.6.28” source package in Intrepid:
  Invalid

Bug description:
  The iwl3945 driver in Intrepid doesn't appear to see !US wireless
  channels, even on a UK laptop.  My home network is on channel 13 and
  completely open, but Intrepid couldn't find it until I forced it back
  to channel 11.  Hardy on the same hardware found and used the wireless
  on channel 13 just fine.

  [   24.249155] iwl3945: Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux, 1.2.26ks
  [   24.249160] iwl3945: Copyright(c) 2003-2008 Intel Corporation
  [   24.250336] iwl3945 0000:08:00.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
  [   24.250351] iwl3945 0000:08:00.0: setting latency timer to 64
  [   24.250374] iwl3945: Detected Intel Wireless WiFi Link 3945ABG
  [   24.316297] iwl3945: Tunable channels: 13 802.11bg, 23 802.11a channels
  [   24.316994] phy0: Selected rate control algorithm 'iwl-3945-rs'
  [   24.609654] iwl3945 0000:08:00.0: PCI INT A disabled

  08:00.0 Network controller [0280]: Intel Corporation PRO/Wireless 3945ABG [Golan] Network Connection [8086:4222] (re
  v 02)
          Subsystem: Hewlett-Packard Company Device [103c:135c]
          Flags: bus master, fast devsel, latency 0, IRQ 219
          Memory at e8000000 (32-bit, non-prefetchable) [size=4K]
          Capabilities: [c8] Power Management version 2
          Capabilities: [d0] Message Signalled Interrupts: Mask- 64bit+ Queue=0/0 Enable+
          Capabilities: [e0] Express Legacy Endpoint, MSI 00
          Capabilities: [100] Advanced Error Reporting <?>
          Capabilities: [140] Device Serial Number 7f-f9-4f-ff-ff-77-1b-00
          Kernel driver in use: iwl3945
          Kernel modules: iwl3945

  ProblemType: Bug
  Architecture: i386
  DistroRelease: Ubuntu 8.10
  Package: linux-image-2.6.27-7-generic 2.6.27-7.13
  ProcCmdLine: root=UUID=55921fa8-4aa5-49ee-9079-c0fad8db5641 ro splash
  ProcEnviron:
   PATH=/usr/lib/ccache:/home/username/bin:/sbin:/usr/sbin:/usr/lib/ccache:/home/username/bin:/sbin:/usr/sbin:/home/username/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
   LANG=en_GB.UTF-8
   SHELL=/usr/bin/zsh
  ProcVersionSignature: Ubuntu 2.6.27-7.13-generic
  SourcePackage: linux

  *** WORKAROUND ***

  In order to use non-US wireless channels, add the following to /etc/modprobe.d/options:
  options cfg80211 ieee80211_regdom=EU

  Note that if you are using a driver from the linux-backport modules
  you would need to add the followng to /etc/modprobe.d/options instead:

  options lbm_cw_cfg80211 ieee80211_regdom=EU

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