Return-path: Received: from mail.candelatech.com ([208.74.158.172]:43568 "EHLO ns3.lanforge.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751839AbaC1PCW (ORCPT ); Fri, 28 Mar 2014 11:02:22 -0400 Message-ID: <53358EFB.1030308@candelatech.com> (sfid-20140328_160225_397882_6CC810B0) Date: Fri, 28 Mar 2014 08:02:19 -0700 From: Ben Greear MIME-Version: 1.0 To: Bruno Antunes CC: linux-wireless@vger.kernel.org, sedat.dilek@gmail.com Subject: Re: Setting txpower fails? References: <5334F8E7.1070803@candelatech.com> <533584BF.70604@candelatech.com> <4CC49FDB-1767-4A3F-9C1D-8F8DCF612233@gmail.com> <53358920.6030304@candelatech.com> <8BD1BFE8-263F-4EDC-8044-30F4FBC44041@gmail.com> In-Reply-To: <8BD1BFE8-263F-4EDC-8044-30F4FBC44041@gmail.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Sender: linux-wireless-owner@vger.kernel.org List-ID: On 03/28/2014 07:49 AM, Bruno Antunes wrote: > > On 28 Mar, 2014, at 14:37 , Ben Greear wrote: > >> On 03/28/2014 07:29 AM, Bruno Antunes wrote: >>> Hi Ben, >>> I think you are missing some parameters >>> >>> On 28 Mar, 2014, at 14:18 , Ben Greear wrote: >>> >>>> On 03/28/2014 12:27 AM, Sedat Dilek wrote: >>>>> On Fri, Mar 28, 2014 at 5:21 AM, Ben Greear wrote: >>>>>> Any idea why this isn't working? >>>>>> >>>>>> Kernel is 3.9.11+, driver is ath9k. >>>>>> >>>>>> [root@ct523-9292 lanforge]# iwconfig wlan0 >>>>>> wlan0 IEEE 802.11abgn ESSID:off/any >>>>>> Mode:Managed Access Point: Not-Associated Tx-Power=16 dBm >>>>>> Retry short limit:7 RTS thr:off Fragment thr:off >>>>>> Encryption key:off >>>>>> Power Management:off >>>>>> >>>>>> [root@ct523-9292 lanforge]# iwconfig wlan0 txpower 10 >>> >>> iw dev set txpower [] >>> >>> It should be something like: >>> >>> iw dev wlan0 set txpower fixed 1000 >> >> Ok, that doesn't give an error, but 'iwconfig' still shows 16 dBm, >> and I don't see any way to get 'iw' to print out the power itself? >> >> So, not sure if it is really working or not. > It works , at least on iw 3.10. > > If you have debug enabled you can see the value changing. Just for posterity's sake, it seems you should really be looking at user_power_level: [root@ct523-9292 lanforge]# iw dev wlan0 set txpower fixed 1000 [root@ct523-9292 lanforge]# cat /debug/ieee80211/wiphy0/netdev\:wlan0/txpower 0 [root@ct523-9292 lanforge]# [root@ct523-9292 lanforge]# cat /debug/ieee80211/wiphy0/netdev\:wlan0/user_power_level 10 Thanks, Ben > > On a openwrt system > > root@RSPro2:/lib/wifi# iw dev adhoc0 set txpower fixed 900 > root@RSPro2:/lib/wifi# cat /sys/kernel/debug/ieee80211/phy0/netdev:adhoc0/txpower > 9 > root@RSPro2:/lib/wifi# iw dev adhoc0 set txpower fixed 1500 > root@RSPro2:/lib/wifi# cat /sys/kernel/debug/ieee80211/phy0/netdev:adhoc0/txpower > 15 > > And the received power changes on the station confirming that is making effect. > > Bruno > >> >> Thanks, >> Ben >> >> >> -- >> Ben Greear >> Candela Technologies Inc http://www.candelatech.com >> -- Ben Greear Candela Technologies Inc http://www.candelatech.com