To: linux-kernel@vger.kernel.org
From: Charles Lepple <clepple@ghz.cc>
Subject: Re: Can't read fan-speeds from i2c
Date: Tue, 19 Aug 2003 22:48:14 -0400
Message-ID: <3F42E16E.8070809@ghz.cc>
References: <1061324213.708.6.camel@chevrolet.hybel>
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Stian Jordet wrote:
> I have a Asus CUV266-DLS, which uses the as99127f chipset. Everything
> seems to work as it is supposed to, except for fan-speeds. They say 0.
> Is that supposed behaviour since the as99127f doesn't have any
> datasheets, or am I doing something wrong?

Have you tried adjusting the fan divisors (fan_div* in 
/sys/bus/i2c/devices/*)? Keep multiplying the fan divisor by two, and 
check the fan_input* devices-- you may have slow fans (or divide-by-two 
speed sensors), and you might need a longer sampling interval to see the 
lower speed.

Another option is to start the Windows monitoring program, perform a 
warm reboot into Linux, and use i2cdump to see how they configured the 
registers. Be sure to prevent your i2c drivers from loading, as a number 
of them initialize the chips to default settings.

-- 
Charles Lepple <ghz.cc!clepple>
http://www.ghz.cc/charles/


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