[MinnowBoard] Problem reading CPU temp in linux (yocto build)

[nb]

CONFIG_SENSORS_CORETEMP=m

and in lsmod

coretemp               12820  0 


> Le 30 avr. 2015 à 18:04, Darren Hart <dvhart at linux.intel.com> a écrit :
> 
> You will need the.... coretemp module loaded or built-in. You can check if
> it's loaded with lsmod, and if it's configured in by looking for
> CONFIG_SENSORS_CORETEMP in /proc/config.gz:
> 
> $ zcat /proc/config.gz | grep CORETEMP
> 
> Thanks,
> 
> Darren
> 
> On 4/30/15, 8:46 AM, "Gerard Bucas" <gerard.b at tekmagic.net> wrote:
> 
>> Hi Darren 
>> 
>> For Some reason or other I can't find find ANY way to read the Core
>> temperatures (I have multiple boards) as even LMSENSORS doesn't give me
>> that 'ISA Adapter' related core temps that nb reported in this thread.
>> 
>> Not sure what I'm doing wrong - LMSENSORS seems to be working (went
>> through the whole 'sensors-detect' sequence) but it (also) only finds
>> that 'virtual temp' device which also always returns that 26800 value.
>> 
>> I am using latest 0.79 firmware (will add to bug database).
>> 
>> Any ideas how else I can read core temps (yocto Linux build)?
>> 
>> Thanks
>> 
>> Gerard
>> 
>> 
>> 
>>> On Apr 30, 2015, at 11:07 AM, Darren Hart <dvhart at linux.intel.com>
>>> wrote:
>>> 
>>> The "core" temps appear to be correct, while the acpitz driver does not
>>> appear to be providing updates. I will raise this with the driver teams.
>>> Thank you for reporting.
>>> 
>>>> On 4/29/15, 2:46 PM, "nb" <nb at dagami.org> wrote:
>>>> 
>>>> Hi,
>>>> 
>>>> I always have same value (26.8°C), whatever the cpu does.
>>>> 
>>>> Regards
>>>> 
>>>> nb
>>>> 
>>>> 
>>>>> Le 29 avr. 2015 à 22:38, Gerard Bucas <gerard.b at tekmagic.net> a écrit
>>>>> :
>>>>> 
>>>>> Hi nb
>>>>> 
>>>>> Thanks but I see that your  temp ALSO returns 26.8C (same as mine!!).
>>>>> That is the 'problem', no matter what the chip temp is (could be too
>>>>> hot
>>>>> to even touch under heavy load) - the temp returned is ALWAYS 26.8C!!!
>>>>> 
>>>>> Have a look and let me know if that is also what you observe (seems
>>>>> like it from what you wrote as it is too much of a co-incidence that
>>>>> you
>>>>> get EXACTLY the same value as I do - hot or cold!!)
>>>>> 
>>>>> Thanks
>>>>> 
>>>>> Gerard
>>>>> 
>>>>> 
>>>>>> On Apr 29, 2015, at 4:24 PM, nb <nb at dagami.org> wrote:
>>>>>> 
>>>>>> Hi Gerard,
>>>>>> 
>>>>>> On my Debian:
>>>>>> 
>>>>>> sensors
>>>>>> acpitz-virtual-0
>>>>>> Adapter: Virtual device
>>>>>> temp1:        +26.8°C  (crit = +90.0°C)
>>>>>> 
>>>>>> coretemp-isa-0000
>>>>>> Adapter: ISA adapter
>>>>>> Core 0:       +50.0°C  (high = +110.0°C, crit = +110.0°C)
>>>>>> Core 2:       +51.0°C  (high = +110.0°C, crit = +110.0°C)
>>>>>> 
>>>>>> So it¹s the same (sensors is in lm-sensors package)
>>>>>> 
>>>>>> Regards
>>>>>> 
>>>>>> nb
>>>>>> 
>>>>>> 
>>>>>>> Le 29 avr. 2015 à 22:04, Gerard Bucas <gerard.b at tekmagic.net> a
>>>>>>> écrit
>>>>>>> :
>>>>>>> 
>>>>>>> Hi Everyone,
>>>>>>> 
>>>>>>> We use linux (custom built with yocto project) on minnowBoard MAX.
>>>>>>> Works great!
>>>>>>> 
>>>>>>> However, I have a problem reading the CPU core temperature of the
>>>>>>> E3825. 
>>>>>>> When I use this command line:
>>>>>>> 
>>>>>>> cat /sys/class/thermal/thermal_zone0/temp
>>>>>>> 
>>>>>>> It ALWAYS returns the value: 26800 (= 26.8C)
>>>>>>> 
>>>>>>> Linux kernel version: 3.19.2-yocto-standard
>>>>>>> 
>>>>>>> Build Configuration:
>>>>>>> BB_VERSION        = "1.27.0"
>>>>>>> BUILD_SYS         = "x86_64-linux"
>>>>>>> NATIVELSBSTRING   = "Ubuntu-14.04"
>>>>>>> TARGET_SYS        = "x86_64-poky-linux"
>>>>>>> MACHINE           = "intel-corei7-64" (recommended by Intel for Atom
>>>>>>> E38XX SoC & minnowBoard MAX)
>>>>>>> DISTRO            = "poky"
>>>>>>> DISTRO_VERSION    = "1.8+snapshot-20150429"
>>>>>>> 
>>>>>>> It looks like this value is hard-coded in the kernel! In researching
>>>>>>> this on the internet it seems that many people have this problem
>>>>>>> with
>>>>>>> a variety of Intel based CPU's/SoC's on a variety of different linux
>>>>>>> distributions.
>>>>>>> 
>>>>>>> Has anyone else solved this problem or do you know of another linux
>>>>>>> command line that would give me the CPU (chip) temperature?
>>>>>>> 
>>>>>>> I have tried to add the "lm-sensors" package but have had problems
>>>>>>> adding it to my yocto build as I can't seem to find the right
>>>>>>> "package
>>>>>>> group" that includes lm-sensors.
>>>>>>> Any ideas/help would be MUCH appreciated!
>>>>>>> 
>>>>>>> Thanks
>>>>>>> Gerard
>>>>>>> 
>>>>>>> _______________________________________________
>>>>>>> elinux-MinnowBoard mailing list
>>>>>>> elinux-MinnowBoard at lists.elinux.org
>>>>>>> http://lists.elinux.org/mailman/listinfo/elinux-minnowboard
>>>> 
>>>> _______________________________________________
>>>> elinux-MinnowBoard mailing list
>>>> elinux-MinnowBoard at lists.elinux.org
>>>> http://lists.elinux.org/mailman/listinfo/elinux-minnowboard
>>> 
>>> 
>>> -- 
>>> Darren Hart
>>> Intel Open Source Technology Center
>>> 
>>> 
>>> 
>> 
> 
> 
> -- 
> Darren Hart
> Intel Open Source Technology Center
> 
> 
> 
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