[lm-sensors] Kernel 2.6.24 and the F1882G chip

MillTek mill.tek at verizon.net
Wed Feb 13 16:23:52 CET 2008


Thanks Jean. I'll try that and get back if it doesn't work out.

Jim

Jean Delvare wrote:
> Hi Jim,
>
> On Tue, 12 Feb 2008 11:39:35 -0600, MillTek wrote:
>   
>> I've just been told that I've screwed up by using the 'reply' button.  
>> Apparently this caused my initial posts to become threaded into other 
>> topics instead of starting a new on which can cause confusion. I 
>> apologize for that.
>>
>> Anyway, here's my problem;
>>
>> Kernel 2.6.24 for my distro (Arch Linux) came out in the last few days.
>> My board has a Fintek F1882g chip. It means that I can finally get
>>     
>
> I'll assume that you really mean "Fintek F71882FG".
>
>   
>> voltage and fan speeds for the board, so thanks for that.  I am
>> wondering how I correctly calculate the correct offset and factors for
>> the voltage numbers? This is what GKrellm says;
>>
>> Vcor1  1.66  factor 1 offset 0
>> Vcor2  1.24  factor 1 offset 0
>> +3.3v   2.83  factor 3  offset 0
>> +5v      4.82  factor 4.98 offset 0
>> +12v    3.84 factor 4.0  offset 0
>> -12v    -4.35  factor -4.0 offset 0
>> -5v      -1.51  factor -1.667 offset 0
>> in7      1.66    factor 1  offset 0
>> in8       1.54   factor 1 offset 0
>>
>> If there's a website that I should visit can anyone supply a link??
>>     
>
> No, there is no such "website". Each chip is different and each
> motherboard is different. Without technical documentation, you have to
> guess it all by yourself. You shouldn't trust gkrellm, in this
> particular case it is messing everything up completely as far as I can
> see. The default sensors.conf file says:
>
> # Voltage
>     label in0         "3.3V"
>     label in1         "Vcore"
>     (...)
>     label in7         "3VSB"
>     label in8         "Battery"
>
>
> # never change the in0, in7 and in8 compute, these are hardwired in the chip!
>     compute in0       (@ * 2), (@ / 2) 
>     (...)
>     compute in7       (@ * 2), (@ / 2)
>     compute in8       (@ * 2), (@ / 2)
>
> So at least these ones do not depend on your specific motherboard
> (those brand and model name you didn't tell us, BTW).
>
> For the remaining input voltages (in2, in3, in4, in5 and in6), you
> should take a look at what your BIOS prints, that's the best hint you
> can get. The F71882FG datasheet suggests a scaling factor of 5.26
> (actually 247/47) for +5V and 11.00 (220/20) for +12V. If the
> manufacturer followed these recommendations, the raw reading (that you
> get with "sensors -c /dev/null" of +12V should be around +1.090V and
> the raw reading of +5V should be around +0.951V. This might help you
> find out which is which. But again the best way is to compare with what
> the BIOS says.
>
>   

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