[ath9k-devel] AR9285: Possible intermittent connection drop-outs

["Torquil Macdonald Sørensen" <torquil@gmail.com>]

On 23/08/10 14:05, Mohammed Shafi wrote:
> Hi Torquil,
>
>                  Thanks for your ath9k debug messages .I tested the
> ath9k driver in 2.6.35.2
>
> with D-LINK DIR655  router  in ubunt 10.04 , but could not    reproduce
> the issue .I got  all
>
> of  your   similar debugging  messages(invalid cmd 2  several times
> ,cycle count
>
> ,ofdm,cck etc   under healthy connection( which you had  suspected for
> the connection loss ).
>
>                I think those were mainly  (modulation schemes ofdm ,cck ).
>
> while cmd is related to ANI information (enum ath9k_ani_cmd in ani.h).
>
>
> I had got these things under healthy connection ,
>
>   6464.669170] ath: Writing ofdmbase=12582412   cckbase=12582712
> [ 6464.728750] ath: invalid cmd 2
>
>   Aug 23 16:35:51 atheros-laptop kernel: [ 6345.264144] ath: ANI parameters:
> 1994 Aug 23 16:35:51 atheros-laptop kernel: [ 6345.264149] ath:
> noiseImmunityLevel=0, spurImmunityLevel=7, ofdmWeakSigDetectOff=0
> 1995 Aug 23 16:35:51 atheros-laptop kernel: [ 6345.264156] ath:
> cckWeakSigThreshold=0, firstepLevel=2, listenTime=78
> 1996 Aug 23 16:35:51 atheros-laptop kernel: [ 6345.264163] ath:
> cycleCount=1452171193, ofdmPhyErrCount=436, cckPhyErrCount=14
> 1997 Aug 23 16:35:51 atheros-laptop kernel: [ 6345.264169]
> 1998 Aug 23 16:35:51 atheros-laptop kernel: [ 6345.264176] ath: ANI
> parameters:
> 1999 Aug 23 16:35:51 atheros-laptop kernel: [ 6345.264181] ath:
> noiseImmunityLevel=0, spurImmunityLevel=7, ofdmWeakSigDetectOff=0
> 2000 Aug 23 16:35:51 atheros-laptop kernel: [ 6345.264188] ath:
> cckWeakSigThreshold=0, firstepLevel=2, listenTime=78
> 2001 Aug 23 16:35:51 atheros-laptop kernel: [ 6345.264195] ath:
> cycleCount=1452171193, ofdmPhyErrCount=436, cckPhyErrCount=14
>
>
>
>                         I hope that enabling ATH_DBG_FATAL will give us
> some some clear idea.
>
> If you obtain the ath9k debug messages with ATH_DBG_FATAL please do send
> as soon
>
> as you get it.

Unfortunately, I get no debug output from the FATAL debugging when the problems 
come and go. I also discovered that the same problem persists even when using no 
encryption/authentication on the network.

In addition, this is an area with little to no other wireless networks, and 
problems persists even when I am the only user of the network.

Using Linux 2.6.35.4 at the moment.

Sometimes I get:

ath: tx hung, resetting the chip
ath: DMA failed to stop in 10 ms AR_CR=0x00000024 AR_DIAG_SW=0x00000020

but I suspect that it is not related to my problems.

Best regards
Torquil S?rensen