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[ullix <1456585@xxxxxxxxxxxxxxxxxx>]

Holy Moly! It gives me real pleasure to realize living in some kind of
forbidden world, like outside of North America. Channels 12 and 13 of
WIFI 2.4GHz are valid channels for the whole world, perhaps with the
exception of North America. There is no need to block these channels!

The problem was that my router was transmitting on channel 13. And both
channels 12 and 13 are NOT seen on my DELL, neither on 14.04 nor on
Vivid.

As iwlist finds channels 1...13 (in the previous I said 14? Not seen
anymore, maybe I had mislooked). This suggests that the clipping of the
2 channels may not be done by the broadcom module, but by something else
in the ubuntu configuration.

I have now forced the router to channels 1...11 and wifi works well.

-- 
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https://bugs.launchpad.net/bugs/1456585

Title:
  14e4:43b1 DELL XPS 13 (9343) Only wireless 5GHz works, but not 2.4GHz

Status in Broadcom 802.11 Linux STA driver:
  New
Status in bcmwl package in Ubuntu:
  Triaged
Status in linux package in Ubuntu:
  Invalid

Bug description:
  This laptop came factory preinstalled with Ubuntu 14.04, but it had
  and still has way too many problems.

  I have now kernel 3.16.0-37-generic running. The wireless driver is
  wl, installed from bcmwl-kernel-source. I have wireless working at
  5GHz with good speed, everything well. However, I can't connect to
  wireless on 2.4GHz.

  Before I had kernel 3.13.0-52-generic, which had the same problem. I
  tried kernel 4.1.0-rc2 and rc3, but both failed on installing from
  bcmwl-kernel-source.

  Trying "iwlist wlan0 freq" I get a list of channels 1-14 at 2.4GHz,
  and 32-66 at 5GHz. Still, only the 5GHz works. Other devices in my
  house do connect well to the 2.4GHz (from a Fritzbox router).

  "iwlist wlan0 scan" has "no scan result" when 5GHz is disabled, and
  finds one network at 5.18GHz when enabled.

  Network controller [0280]: Broadcom Corporation BCM4352 802.11ac Wireless Network Adapter [14e4:43b1] (rev 03)
  	Subsystem: Dell Device [1028:0019]

  ---
  ApportVersion: 2.14.1-0ubuntu3.10
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  ullix      1839 F.... pulseaudio
   /dev/snd/controlC0:  ullix      1839 F.... pulseaudio
  CurrentDesktop: MATE
  DistributionChannelDescriptor:
   # This is a distribution channel descriptor
   # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
   canonical-oem-somerville-trusty-amd64-20140620-0
  DistroRelease: Ubuntu 14.04
  HibernationDevice: RESUME=UUID=7b6c248b-36d3-4dcf-9e9e-427d50206af6
  InstallationDate: Installed on 2015-04-24 (25 days ago)
  InstallationMedia: Ubuntu 14.04 "Trusty" - Build amd64 LIVE Binary 20140620-04:25
  MachineType: Dell Inc. XPS 13 9343
  NonfreeKernelModules: wl
  Package: linux (not installed)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-37-generic root=UUID=fda802ca-9257-4fed-bb0d-9f4756dca419 ro pcie_aspm=force radeon.modeset=0 plymouth:debug drm.debug=0xe nouveau.modeset=0 video.use_native_backlight=1 quiet splash pcie_aspm=force radeon.modeset=0 nouveau.modeset=0 video.use_native_backlight=1 "acpi_osi=Windows 2013"
  ProcVersionSignature: Ubuntu 3.16.0-37.51~14.04.1-generic 3.16.7-ckt9
  RelatedPackageVersions:
   linux-restricted-modules-3.16.0-37-generic N/A
   linux-backports-modules-3.16.0-37-generic  N/A
   linux-firmware                             1.127.11
  Tags:  trusty
  Uname: Linux 3.16.0-37-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm audio cdrom dialout dip fax floppy fuse lpadmin netdev plugdev sambashare scanner sudo tape video
  _MarkForUpload: True
  dmi.bios.date: 03/25/2015
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A03
  dmi.board.name: 0TM99H
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 9
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA03:bd03/25/2015:svnDellInc.:pnXPS139343:pvr01:rvnDellInc.:rn0TM99H:rvrA00:cvnDellInc.:ct9:cvr:
  dmi.product.name: XPS 13 9343
  dmi.product.version: 01
  dmi.sys.vendor: Dell Inc.

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