From owner-freebsd-wireless@FreeBSD.ORG  Thu Feb  2 19:09:53 2012
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Date: Thu, 2 Feb 2012 11:09:51 -0800
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From: Adrian Chadd <adrian@freebsd.org>
To: Lev Serebryakov <lev@freebsd.org>
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Cc: freebsd-wireless@freebsd.org
Subject: Re: "ath0: device timeout" when environment is clear
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2012/2/2 Lev Serebryakov <lev@freebsd.org>

> Hello, Freebsd-wireless.
>
>  Today something strange happens: my noisy environment becomes clear
>  for several hours and my WiFi connection to notebook gives 2.5MiB/s
>  of real file transfer. But I was unable to copy 2GiB file in one
>  piece: ath0 on AP gives "device timeout" every 3-4 minutes!
>
>  When environment is really noisy (as usual), I have only
>  400-500KiB/s of real file transfer, but "ath0: device timeout"
>  occurs only 1-2 times a day or even less.


Are you using 11n?

There may be some more TX handling issues that show up as "device timeout"
but arent' really that.


adrian