[lm-sensors] lm-sensors install changed/corrupted BIOS/chip_firmware???!!!

David Haertig davidhaertig at earthlink.net
Fri Nov 4 16:09:25 CET 2005


Hi Jean -

Thank you.  After posting my last message I found
that sensors.conf file and started learning about
it.  I figured all's I had to do was configure
a few things.  You've confirmed that.  Will try
to do all that tonight.  Thanks very much for
the help and your dedication to lm-sensors!

Jean Delvare wrote:
> Hi David,
> 
> On 2005-11-04, David Haertig wrote:
> 
>>Now the sensors program is reporting good data, more or less.
>>Below are the results from sensors and the results that BIOS
>>reports during boot.  Looks like the it8712 section gets the two
>>fan speeds correct, and some of the voltages.  Notable is that
>>the it8712 reports the +3.3 as +6.5 whereas BIOS reads the +3.3
>>as +3.23
> 
> 
> Take a look at /etc/sensors.conf should, there's a beautiful comment in
> the it87-* section about that problem exactly:
> 
>   # If 3.3V reads 2X too high (Soyo Dragon and Asus A7V8X-X, for example),
>   # comment out following line.
>      compute in2   2*@ , @/2
> 
> Given the number of times users reported about this, I wonder if we
> shouldn't comment out that line by default.
> 
> 
>>If you ignore the it8712 bad readings on -5 and -12
>>(these seem totally bogus), the rest of the it8712 voltage
>>readings look good.
> 
> 
> It's quite frequent that negative voltage lines are not monitored (as
> stated in our FAQ). I'm not even sure these lines are used on modern
> systems. If the BIOS doesn't list them, they are probably not wired for
> monitoring. Add the following to your configuration file:
> 
>    ignore in5
>    ignore in6
> 
> And comment out the set in{5,6}_{min,max} lines.
> 
> 
>>The it8712 gets all the temperatures wrong however.
>>
>>Scroll down to the lm90 section and you'll see good readings
>>for both the CPU and system temps.
> 
> 
> No surprise here, it all makes sense. They wanted to use a dedicated chip
> for temperature monitoring (LM90), so they don't use the IT8712F
> temperature monitoring feature. You may try changing the sensor types
> between 2 (thermistor) and 3 (diode) and see if it provides plausible
> measurements, but chances are it won't.
> 
> You can set the thermal sensor types to 0 to disable these inputs, add
> "ignore" statements and comment out the "set" statements.
> 
> 
>>The eeprom section looks pretty useless to me, but the data
>>it reports is correct.  I didn't know you needed a "sensor"
>>to tell you how much memory you have!  ;-)
> 
> 
> Future versions of libsensors will not show non-hardware-monitoring chips
> anymore. Eeproms were listed for historical reasons.
> 
> --
> Jean Delvare
> 




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