[MinnowBoard] Problem reading CPU temp in linux (yocto build)
Gerard Bucas
gerard.b at tekmagic.net
Thu Apr 30 17:10:52 UTC 2015
Hi nb
Thanks for all your great feedback.
I don't have that CONFIG_SENSORS_CORETEMP file.
It seems I must be missing some key "part" of lmsensors...
I ran "sensors-detect" and then when I run "sensors" I only get:
acpitz-virtual-0
Adapter: Virtual device
temp1: +26.8 C (crit = +90.0 C)
Any ideas what else I need to do or install?
My yocto "local.conf" build file includes the following for adding "lmsensors":
IMAGE_INSTALL_append = " \
lmsensors-libsensors \
lmsensors-sensors \
lmsensors-sensord \
lmsensors-fancontrol \
lmsensors-sensorsdetect \
lmsensors-sensorsconfconvert \
lmsensors-pwmconfig \
lmsensors-isatools \
lmsensors-config-cgi \
"
Would REALLY appreciate any help/pointers to get this working...
THANKS!
Gerad
-----Original Message-----
From: nb [mailto:nb at dagami.org]
Sent: Thursday, April 30, 2015 12:30 PM
To: MinnowBoard Development and Community Discussion
Cc: Gerard Bucas
Subject: Re: [MinnowBoard] Problem reading CPU temp in linux (yocto build)
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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