Re: [lm-sensors] Soltek K8T800Pro (it87-isa-0290),

[Moofie <moofie@shaw.ca>]

Jean Delvare wrote:
> On Thu, 08 Apr 2010 16:50:41 -0700, Moofie wrote:
>> Moofie wrote:
>>> Hello list, this is my first time posting here, and I come with some 
>>> questions about my server motherboard with the hopes that I configure 
>>> sensors on it correctly.
>>>
>>> While this Soltek board is relatively old (as the company is no longer 
>>> in business), I had never used it since the day that I bought it.  The 
>>> board was recently installed into a server role and I hope to monitor 
>>> its health from a distance.
>>>
>>> While sensors detects the correct chips installed on the board, the 
>>> values are useless.
>>>
>>> I'm wondering if anyone can shed light on how to set the values 
>>> correctly for this board.  Here's some pertinent info:
>>>
>>>
>>>
>>> ITE IT8712F, National LM90 (ISA 290h, SMBus 4Ch)
>>>
>>>
>>>
>>> acpitz-virtual-0
>>> Adapter: Virtual device
>>> temp1:       +40.0°C  (crit = +75.0°C)
>>>
>>> k8temp-pci-00c3
>>> Adapter: PCI adapter
>>> Core0 Temp:  +50.0°C
>>> Core1 Temp:  +42.0°C
>>>
>>> it87-isa-0290
>>> Adapter: ISA adapter
>>> in0:         +1.31 V  (min =  +0.00 V, max =  +4.08 V)
>>> in1:         +2.54 V  (min =  +0.00 V, max =  +4.08 V)
>>> in2:         +3.28 V  (min =  +0.00 V, max =  +4.08 V)
>>> in3:         +2.90 V  (min =  +0.00 V, max =  +4.08 V)
>>> in4:         +2.91 V  (min =  +0.00 V, max =  +4.08 V)
>>> in5:         +0.96 V  (min =  +0.00 V, max =  +4.08 V)
>>> in6:         +1.12 V  (min =  +0.00 V, max =  +4.08 V)
>>> in7:         +2.94 V  (min =  +0.00 V, max =  +4.08 V)
>>> Vbat:        +3.26 V
>>> fan1:       11250 RPM  (min = 3245 RPM)
>>> fan2:       4963 RPM  (min =    0 RPM)
>>> temp1:       +26.0°C  (low  =  -1.0°C, high = +127.0°C)  sensor = 
>>> thermistor
>>> temp2:       -86.0°C  (low  =  -1.0°C, high = +127.0°C)  sensor = 
>>> thermal diode
>>> temp3:       +14.0°C  (low  =  -1.0°C, high = +127.0°C)  sensor = 
>>> thermistor
>>>
>>> lm90-i2c-0-4c
>>> Adapter: SMBus Via Pro adapter at 5000
>>> temp1:       +38.0°C  (low  =  +0.0°C, high = +70.0°C)
>>>                       (crit = +85.0°C, hyst = +75.0°C)
>>> temp2:       +63.1°C  (low  =  +0.0°C, high = +70.0°C)
>>>                       (crit = +85.0°C, hyst = +75.0°C)
>>>
>>>
>>> If I can provide more information, let me know.
>> OK, I give, what is the LM90 chip usually used for?
> 
> Monitoring temperature.
> 
>> I understand that temp1 is its own temperature.
> 
> Yes it is.
> 
>> Though is that basically the only use of an lm90 chip?  To test one
>> local and one remote temperature?
> 
> Well, yes, that's a temperature monitoring chip, what else would you
> want it to be used for?
> 

Oh nothing specific, I was only unclear of its function as I had an 
ITE8705 _and_ an LM90 which seemed superfluous hence my question as to 
its purpose.

>> What have people used in real world examples for this chip?  Usually M/B 
>> temp and CPU temp?  I see that temp2 jumps with the CPU temperature, I'm 
>> going to assume it's correct as it matches the BIOS readings and I will 
>> label it as such.
> 
> Yes, temp1 = M/B temperature and temp2 = CPU temperature is the most
> typical usage for LM90-like chips on mainboards. On graphics cards,
> they are used as temp1 = card temperature and temp2 = GPU temperature.
> 
>> Though the k8 temps measure each core.  And... They're off by a few 
>> degrees (12C in the above example) so which should I take as correct? 
>> None of the above examples have compute lines so they seem to be as raw 
>> as lm-sensors believes them to be.
> 
> The K8 internal sensors have not impressed us by their reliability so
> far. See the note on http://www.lm-sensors.org/wiki/Devices and various
> reports on this list.

I can't connect to the lm-sensors.org site, it keeps timing out for the 
last few hours.  I will attempt at reading the wiki entry later.  Should 
I start looking for an offset to garner a better reading from the k8 
sensors?

> The LM90 temp1 reading should be accurate out of the box, no compute
> statement needed. The LM90 temp2 reading might need an offset,
> depending on the thermal diode model being used. Ideally, the BIOS
> would have set it up properly, so that it itself reports accurate
> temperature readings. I agree that the LM90 temp2 value is quite high
> on your system, but I would tend to trust it, especially if the BIOS
> reports the same.
> 
> 

As in my other post to you, it's not exactly accurate, the manufacturer 
attempted a fix and broke the rest of the BIOS.  I'm guessing with a 
compute line to reduce the reading by 10%.

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