Re: Linux 3.6.5

[Eddie Chapman <eddie@ehuk.net>]

Hi Johannes,

On 06/11/12 16:39, Johannes Berg wrote:
> 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.

In the AP's dmesg output which I included in my other message, I see this:

<6>[    9.300000] cfg80211: Regulatory domain changed to country: GB

So it seems the AP knows where it is, but is it not transmitting that to 
the client?

Eddie