Re: [lm-sensors] Whats wrong with LM-Sensors

[Guenter Roeck <linux@roeck-us.net>]

On 09/08/2013 01:01 PM, Tomas Larsson wrote:
>> -----Original Message-----
>> From: Jean Delvare [mailto:khali@linux-fr.org]
>> Sent: Sunday, September 08, 2013 9:10 PM
>> To: Guenter Roeck
>> Cc: Tomas Larsson; lm-sensors@lm-sensors.org
>> Subject: Re: [lm-sensors] Whats wrong with LM-Sensors
>>
>> On Sun, 08 Sep 2013 11:58:39 -0700, Guenter Roeck wrote:
>>> Different driver. Centos 6.4 uses the coretemp driver which gets the
>>> temperature from the CPU directly. Unfortunately, Centos 6.4 is quite
>>> old when it comes to kernel version, and so is its coretemp driver.
>>> The displayed temperatures in your version are all wrong; the maximum
>> temperature for Atom 330 is 125 degrees C, not 90 degrees C.
>>> You'll have to add 35 degrees C to the displayed temperature.
>>>
>>> You could either update the coretemp driver to a later version to fix
>>> this, or add the offset to /etc/sensors3.conf.
>>>
>>> Note that CPU temperatures are notoriously unreliable.
>>
>> "Inaccurate in the low temperature range" is a better way to describe the
>> situation IMHO. The coretemp values are reliably telling the user when the
>> temperature gets too close to the high limit.
>>
>> --
>> Jean Delvare
>
> Well, I'm aware of that, what I want to know is when the fan fails, these
> 40mm fans are not that reliable, unfortunately.

Not sure if you can use the cpu temperature to predict if the fans are working
or not. The CPU can get pretty hot under load, even with the fans working.

Your initial e-mail showed the fan speeds as 0. Are they broken
or turned off or not connected to the fan speed sensors ?

Guenter


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