Re: reading on-die temperature sensor of AMD A10 5700 processor

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On Tue, Aug 13, 2013 at 11:02 PM, Guenter Roeck <linux@xxxxxxxxxxxx> wrote:
On 08/13/2013 07:41 PM, Dev, Kapil wrote:
Thanks again Guenter!




On Tue, Aug 13, 2013 at 5:51 PM, Guenter Roeck <linux@xxxxxxxxxxxx <mailto:linux@xxxxxxxxxxxx>> wrote:

    On Tue, Aug 13, 2013 at 05:11:31PM -0400, Dev, Kapil wrote:
     > Thanks for the response Guenter!
     >
     > I put the system on load and I noticed their value hardly changes. To my
     > surprise, I ran a benchmark for 3 minutes and none of temp*  values changed
     > during execution. The highest reported temperature is always 48C.
     >
     > I was expecting that the internal temperature would have "sensor = thermal
     > diode" or "sensor = core" as a keyword. I thought "sensor=thermistor" means
     > the corresponding sensor is on the motherboard and not the internal
     > die-sensor.
     >
    Sure, but who knows if they put a sensor below the CPU for some reason ...

    I am not familiar with the A10 CPUs. Are those similar to K10 ?
    If so, maybe the k10temp driver works or could be extended to support it.
    Can you give it a try ?

    If it does not work out of the box, can you send me the output of "lspci -nn" ?


Kapil: I believe K10 corresponds to A8 seried, and A10 has Bulldozer architecture (http://www.cpu-world.com/CPUs/Bulldozer/TYPE-A10-Series.html). I am not sure how different they are though. I tried K10, but it did not work out of the box. I am looking into k10temp.c driver now. Also,I am attaching the output of "lspci -nn" command herewith; you might have to open it using wordpad for proper formatting..


Your lspci output includes

00:18.3 Host bridge [0600]: Advanced Micro Devices [AMD] Device [1022:1403]

which is supported by the latest k10temp driver. Support was added early last year.
What is your kernel version, and can you switch to a more recent version ?

Kapil: I have 2.6.39-020639-generic kernel. Is it too old kernel for k10temp driver to work? Which stable kernel should I upgrade to?
 

Thanks,
Guenter



Thanks,
Kapil
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