From owner-freebsd-wireless@FreeBSD.ORG  Wed Jul 18 23:32:23 2012
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Date: Wed, 18 Jul 2012 19:32:20 -0400
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From: Kim Culhan <w8hdkim@gmail.com>
To: Adrian Chadd <adrian.chadd@gmail.com>
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Cc: freebsd-wireless@freebsd.org
Subject: Re: AR9227 hostap on FreeBSD 10-current
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On Wed, Jul 18, 2012 at 6:54 PM, Adrian Chadd <adrian.chadd@gmail.com> wrote:
> It says HT40, so it's 11n.
>
> Do 'ifconfig wlan0 list sta', see what speeds the stations are at.
>
> Do 'sysctl dev.ath.0.sample_stats=1' and check dmesg, see whether it's
> TXing using MCS or legacy rates.

ifconfig list sta returns:

ADDR               AID CHAN RATE RSSI IDLE  TXSEQ  RXSEQ CAPS FLAG
90:f6:52:76:ec:98    3   11 135M 20.0    0    872  22944 EPS  AQEHTRS
WME HTCAP ATH RSN
f8:d1:11:39:4f:b4    1   11 243M 22.0    0    273  64208 EPS  AQEHTRS
RSN WME HTCAP

The first sta is a TP-Link TL-WA701ND in client mode

The second sta is the other AR9227 device which is a TP-Link TL-WN851ND V1

sysctl dev.ath.0.sample_stats=1

returns

dev.ath.0.sample_stats: 0 -> 0

I don't see anything ath to add to the kernel config, wonder whats causing that?

-kim