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From: Helmut Schaa <helmut.schaa@googlemail.com>
To: Kalle Valo <kalle.valo@iki.fi>
Subject: Re: ath9k becon loss messages
Date: Mon, 6 Apr 2009 09:14:31 +0200
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Cc: Jaswinder Singh Rajput <jaswinder@kernel.org>,
       Michael Buesch <mb@bu3sch.de>, Sujith <Sujith.Manoharan@atheros.com>,
       wireless <linux-wireless@vger.kernel.org>,
       David Miller <davem@davemloft.net>, LKML <linux-kernel@vger.kernel.org>
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Am Sonntag, 5. April 2009 schrieb Kalle Valo:
> Jaswinder Singh Rajput <jaswinder@kernel.org> writes:
> 
> >> And besides that, I think one can easily remotely trigger this
> >> message and flood the logs. So it should probably _also_ be
> >> ratelimited.
> >
> > normally it prints after 120 seconds:
> >
> > [ 1078.848434] wlan0: beacon loss from AP 00:11:95:9e:df:f6 - sending probe request
> > [ 1198.822913] wlan0: beacon loss from AP 00:11:95:9e:df:f6 - sending probe request
> > [ 1318.824931] wlan0: beacon loss from AP 00:11:95:9e:df:f6 - sending probe request

> Then there is something happening in ath9k or your AP which prevents
> ath9k from receiving beacons. Try pinging your AP with 100 ms
> interval. Do you see anything happening in 120 s intervals?

NetworkManager typically scans every 120 seconds and I can also trigger
the messages by a manual scan with iwlist. I did not dig any further but
the messages seem to appear right at the end of the scan. Tried with iwlagn
and both sw_scan and hw_scan.

Helmut