On Wed, Jun 12, 2013 at 08:09:32PM -0000, EricDHH wrote:
> Here is something crude from dmesg, 11 available channels for bg, but i
> have a bgn router that offers channels above.
> 
> [   13.840781] iwl4965: Intel(R) Wireless WiFi 4965 driver for Linux, in-tree:
> [   13.840788] iwl4965: Copyright(c) 2003-2011 Intel Corporation
> [   13.840951] iwl4965 0000:10:00.0: Detected Intel(R) Wireless WiFi Link 
> 4965AGN, REV=0x4
> [   13.880232] iwl4965 0000:10:00.0: device EEPROM VER=0x36, CALIB=0x5
> [   13.937939] iwl4965 0000:10:00.0: Tunable channels: 11 802.11bg, 13 
> 802.11a channels
> [   13.938061] iwl4965 0000:10:00.0: irq 45 for MSI/MSI-X
> [   13.954441] iwl4965 0000:10:00.0: loaded firmware version 228.61.2.24

Yeah, that's expected given that iw indicated you only have 11 channels
available in the 2.4 GHz band.

I posted a test build at
http://people.canonical.com/~sforshee/lp1188400/linux-3.8.0-25.37~lp1188400v201306141308/
which has CONFIG_IWLEGACY_DEBUG=y in the configuration. Install this
kernel and reboot into it with iwl4965.debug=0x40, then collect dmesg
and attach it here. I'm fairly certain we'll find that the card you have
is one that doesn't claim support for channels 12 and 13.

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https://bugs.launchpad.net/bugs/1188400

Title:
  Wifi channels 12 and 13 unusable

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