From mboxrd@z Thu Jan  1 00:00:00 1970
From: Beat Meier <mbe_ml@swiss-wireless.com.ar>
Date: Tue, 07 Jan 2014 15:50:44 -0300
Subject: [ath9k-devel] Cannot disable power save mode on WLM200NX AR922X
Message-ID: <52CC4C84.2020201@swiss-wireless.com.ar>
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To: ath9k-devel@lists.ath9k.org

Hello

After having no luck and no answer with my problems with ath5k driver
and mostly cards I use (bad throughput, bad signal) for
long distance links in 2.4GHz/5.8GHz I bought new WLM200NX cards
(AR922X) which use ath9k.
It works very nice for throughput! But I have a power sleep problem with
this cards
It fills me the syslog with the following messages:

[1198371.442029] ath1: STA 04:f0:21:06:20:b1 aid 1 exits power save mode
[1198371.442072] ath1: STA 04:f0:21:06:20:b1 aid 1 sending 0 filtered/0
PS frames since STA not sleeping anymore
[1198429.914624] ath1: STA 04:f0:21:06:20:b1 aid 1 enters power save mode
[1198429.918340] ath1: STA 04:f0:21:06:20:b1 aid 1: PS buffer for AC 2
[1198429.919472] ath1: STA 04:f0:21:06:20:b1 aid 1 exits power save mode

I see that power save mode is enabled,
iw dev ath1 get power_save
Power save: on

but try to disable power save mode fails
iw dev ath1 set power_save off
command failed: Operation not supported (-95)

try to settting results in no error, no output
iw dev ath1 set power_save on

By default power save is on on this card.

Is disabling not enabled or is this a bug?

Greetings a thanks

Beat