Re: kern/170254: [ath] Atheros 9220 device timeouts.

The following reply was made to PR kern/170254; it has been noted by GNATS.

From: Adrian Chadd <adrian@freebsd.org>
To: lev@freebsd.org
Cc: bug-followup@freebsd.org
Subject: Re: kern/170254: [ath] Atheros 9220 device timeouts.
Date: Mon, 30 Jul 2012 14:39:44 -0700

 On 30 July 2012 00:18, Lev Serebryakov <lev@freebsd.org> wrote:
 > Hello, Bug-followup.
 >
 >  Here  is  more  logs.  Now,  client  was 802.11g only, and it was not
 >  sleeping (I've wathcied movie on notebook from server, via WiFi).
 >  I've got multiple device timeouts (1 per 20-30 seconds), and notebook
 >  lost connection at all (it shows my AP in list of available APs, but
 >  cannot associate with it). Only after 10 minutes (!) AP becomes
 >  available again.

 Howdy,

 I'm going over the logs now. Thanks very much for this.

 Now, whilst I'm doing so - the next time this TX hang happens (where
 you can scan but can't associate/pass traffic), can you please log in
 to the AP and do 'sysctl dev.ath.0.txagg=1' and include that? I bet
 we'll find the TX buffers have been exhausted.

 The TX buffer exhaustion issue should really be fixed as a separate
 issue. I would like to see why you're seeing TX stalls.

 Adrian
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