Re: [lm-sensors] Strange temperature of AMD FX4100 cpu and power consumption

[Andreas Hartmann <andihartmann@01019freenet.de>]

Andreas Herrmann wrote:
> On Mon, Sep 10, 2012 at 09:13:46PM +0200, Andreas Hartmann wrote:
>> Andreas Herrmann wrote:
>>> On Sat, Sep 08, 2012 at 09:50:25AM -0700, Guenter Roeck wrote:
>>>> On Sat, Sep 08, 2012 at 06:34:16PM +0200, Andreas Hartmann wrote:
>>>
>>>   [...]
>>>
>>>>> fam15h_power-pci-00c4
>>>>> Adapter: PCI adapter
>>>>> power1:       85.74 W
>>>>>
>>>>> I read about this value, which would be the power consumption of the
>>>>> CPU. If this would be correct, my cpu wouldn't be a cpu but a light bulb
>>>>> :-) and the fan would most probably run on maximum speed non stop (which
>>>>> it doesn't do - it's running on minimum).
>>>>>
>>>> If they have a built-in AC unit, both temperature and power consumption would
>>>> make sense. Hmm ... maybe I should apply for a patent on that idea :).
>>>>
>>>>> CPU:       AMD FX(tm)-4100 Quad-Core Processor
>>>>> Board:     Gigabyte GA-990XA-UD3
>>>>> Bios:      Award F11 05/17/2012
>>>>> Kernel:    3.4.10-1.1-desktop 64 bit (openSUSE)
>>>>> lmsensors: sensors-3.3.2-55.1.x86_64
>>>>>
>>>>>
>>>>> Do you need more information about the hardware? Feel free to ask!
>>>
>>> What's the output of
>>>
>>>   # setpci -s 18.5 0xe0.l
>>
>> Hmm, a few hours later and one s2ram / resume cycle in between, the
>> power value is broken again. It's showing constantly
>> 	power1:       85.74 W
>> in idle mode. setpci now says:
>>
>> 00fff83e (first try)
>>
>> 00fffffe (all other tries)
>>
>>
>> As I did it a few hours ago, I got 003930c9 and the reported values have
>> been between 26 W and 40 W (sounds reasonable to me) - before and after
>> entering setpci.
> 
> We had added a quirk to set a different initialization value for the
> running average range register (It's 0xe after resume on your box, we
> set it to 0x9, see also your mail where you reported 0x003930c9 for
> the setpci command output.)
> 
>  commit 00250ec90963b7ef6678438888f3244985ecde14
>  Author: Andre Przywara <andre.przywara@amd.com>
>  Date:   Mon Apr 9 18:16:34 2012 -0400
> 
>     hwmon: fam15h_power: fix bogus values with current BIOSes
> 
> So it seems that the quirk explicitly needs to be applied
> on resume. (as the BIOS restores the old bogus value)

I explicitly tested it for s2ram/resume and it's really like this:
- before s2ram/resume: values are ok
- after resume: the value is constantly broken as reported.

> Thanks for testing.

No matter.

> Will look at how to address this with a patch.

I could test your patch if you like it.



Thanks,
kind regards,
Andreas Hartmann

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