Message-ID: <1352219976.9440.18.camel@jlt4.sipsolutions.net> (sfid-20121106_173951_781497_2AE1DCC1)
Subject: Re: Linux 3.6.5
From: Johannes Berg <johannes@sipsolutions.net>
To: Eddie Chapman <eddie@ehuk.net>
Cc: stable@vger.kernel.org, florian@reitmeir.org,
	linux-wireless@vger.kernel.org, j@w1.fi
Date: Tue, 06 Nov 2012 17:39:36 +0100
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On Tue, 2012-11-06 at 16:54 +0100, Johannes Berg wrote:

> > BSS 82:e1:fa:1a:65:00 (on wlan0) -- associated
> [...]
> > 	HT operation:
> > 		 * primary channel: 9
> > 		 * secondary channel offset: above
> 
> As you can see, it's using HT40+ on channel 9 (2452 MHz). Your HT40
> allow (correctly) map showed:
> 
> 2452 HT40 -
> 
> This is because HT40+ isn't actually allowed on channel 9 by the
> standard (cf. 802.11-2012 Table E-1 (US), E-2 (Europe), E-3 (Japan).

Oops, no, that is obviously wrong. This is permitted outside the US, and
that is reflected in those tables as well (I was confused). However,
your AP isn't transmitting any info on where it is, and your device is
set up for world roaming (country is "00" rather than a real country).
Thus, channel 13 isn't allowed and you can't do HT40+ on channel 9.

johannes