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Subject: Re: Mysterious (?) VHT/HT warning on 3.8.2
From: Johannes Berg <johannes@sipsolutions.net>
To: Andrew Lutomirski <luto@mit.edu>
Cc: linux-wireless@vger.kernel.org, stable@vger.kernel.org
Date: Mon, 01 Apr 2013 00:02:04 +0200
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On Sat, 2013-03-30 at 18:49 -0700, Andrew Lutomirski wrote:

> wlan0: capabilities/regulatory prevented using AP HT/VHT
> configuration, downgraded
> 
> Despite this warning, HT seems to work.  I'm getting >7 MB/s over ssh,
> which isn't terrible.

Yeah, the warning is spurious, it's disabling VHT because neither you
nor the AP have it ;-)

I fixed it in

commit 586e01ededf9b713a1512dd658806791a7ca1a50
Author: Johannes Berg <johannes.berg@intel.com>
Date:   Thu Feb 14 12:13:53 2013 +0100

    mac80211: prevent spurious HT/VHT downgrade message

but I guess that didn't make it to 3.8, maybe it should be applied to
stable.

johannes