Message-ID: <499B4526.1030705@lwfinger.net> (sfid-20090218_001613_255092_82E49EFD)
Date: Tue, 17 Feb 2009 17:15:50 -0600
From: Larry Finger <Larry.Finger@lwfinger.net>
MIME-Version: 1.0
To: "P.G. Richardson" <p.g.richardson@phantomjinx.co.uk>
CC: linux-wireless@vger.kernel.org
Subject: Re: rtl8187 cannot fix rate
References: <35879.82.152.175.172.1234904444.squirrel@www.phantomjinx.co.uk>    <499B27A4.30708@lwfinger.net> <42781.82.152.175.172.1234911183.squirrel@www.phantomjinx.co.uk>
In-Reply-To: <42781.82.152.175.172.1234911183.squirrel@www.phantomjinx.co.uk>
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Sender: linux-wireless-owner@vger.kernel.org

P.G. Richardson wrote:
>> P.G. Richardson wrote:
>>> Hi guys,
>>>
>>> More experimentation with my rtl8187. With some playing around with the
>>> access point location, I think I may have stumbled on a good position.
>>>
>>> Anyway ...
>>>
>>> I noticed that the rate reported by iwconfig only ever gets to 11Mb/s
>>> despite the fact that I now have a signal level of 90/100 - 100/100. I
>>> found that I can do
>>>
>>> iwconfig wlan0 rate 54M
>>>
>>> but it seems that although the card is still associated networking
>>> doesnt
>>> work (pings fail). If I change it back to auto
>>>
>>> iwconfig wlan0 rate auto
>>>
>>> then iwconfig reports 11Mb/s again and pinging resumes fine.
>>>
>>> Is there any chance that the driver is incorrectly reporting its mode or
>>> something in that the rates it displays bear the hallmarks of a b card
>>> rather than g?
>>>
>>> Using the compat-wireless snapshot from 9/2/2009
>>> Mandriva 2.6.27.10-desktop586-1mnb
>> What rate-adjustment method are you using? The output of dmesg will tell.
>> If you
>> are using minstrel, then you should post the contents from the following
>> commands:
>>
>> STATS=$(find /sys -name rc_stats)
>> echo $STATS
>> sudo cat $STATS
>>
>> Larry
>>
> 
> phy0: Selected rate control algorithm 'minstrel'
> 
> find /sys -name rc_stats produces no results whatsoever. These is no
> rc_stats in /sys.

You need to set "CONFIG_MAC80211_DEBUGFS=y" in your configuration.

Larry