From: Christian Lamparter <chunkeey@googlemail.com>
To: Marco Fonseca <marco@tampabay.rr.com>
Cc: linux-wireless@vger.kernel.org
Subject: Re: carl9170: Unintentional transmission in monitor mode?
Date: Thu, 9 Aug 2012 21:43:28 +0200 [thread overview]
Message-ID: <201208092143.28506.chunkeey@googlemail.com> (raw)
In-Reply-To: <20120809165434.GA13409@192.168.1.10>
On Thursday, August 09, 2012 06:54:34 PM Marco Fonseca wrote:
> Hello All,
>
> I've noticed unexpected transmissions from the AR9170 while in monitor mode
> and using tcpdump (and sometimes without tcpdump running). These
> transmissions degrade (pretty significantly) performance of other STA/AP on
> the channel (as seen by iperf going from 60mbit/s to almost nill). As best I
> can tell these transmissions never coalesces into an actual frame in the air
> (at least not one I'm able to pick up with a second different adapter in
> monitor mode).
>
> Are there any known reasons/bugs on this? Is there anyway to completely
> silence the transmitter of the AR9170 while still allowing reception?
>
yes. <http://www.spinics.net/lists/linux-wireless/msg88896.html>
a solution is described in:
<http://www.spinics.net/lists/linux-wireless/msg89279.html>
(iw dev wlanX set monitor none - if I'm not mistaken)
Regards,
Chr
next prev parent reply other threads:[~2012-08-09 19:43 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-09 16:54 carl9170: Unintentional transmission in monitor mode? Marco Fonseca
2012-08-09 19:43 ` Christian Lamparter [this message]
2012-08-10 18:49 ` Marco Fonseca
2012-08-16 19:20 ` Johannes Berg
2012-08-16 19:34 ` Christian Lamparter
2012-08-17 2:03 ` Chen, Stephen
2012-08-17 2:30 ` Marco Fonseca
2012-08-17 2:59 ` Chen, Stephen
2012-08-17 12:55 ` marco
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