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Date: Mon, 29 Mar 2004 21:59:55 +0200
From: "Prakash K. Cheemplavam" <PrakashKC@gmx.de>
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To: "Prakash K. Cheemplavam" <PrakashKC@gmx.de>
CC: ross@datscreative.com.au, Len Brown <len.brown@intel.com>,
       Thomas Schlichter <thomas.schlichter@web.de>,
       linux-kernel@vger.kernel.org
Subject: Re: idle Athlon with IOAPIC is 10C warmer since 2.6.3-bk1
References: <200403181019.02636.ross@datscreative.com.au> <1079738422.7279.308.camel@dhcppc4> <405C0EF1.1060104@gmx.de> <200403202019.44612.ross@datscreative.com.au> <405C1C0D.9050108@gmx.de>
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Prakash K. Cheemplavam wrote:
> Ross Dickson wrote:
> 
>> On Saturday 20 March 2004 19:29, Prakash K. Cheemplavam wrote:
>>
>>> Len Brown wrote:
>>>
>>>> On Fri, 2004-03-19 at 14:22, Prakash K. Cheemplavam wrote:
>>>>
>>>>
>>>>
>>>>> Hmm, I just did a cat /proc/acpi/processor/CPU0/power:
>>>>> active state:            C1
>>>>> default state:           C1
>>>>> bus master activity:     00000000
>>>>> states:
>>>>>   *C1:                  promotion[--] demotion[--] latency[000] 
>>>>> usage[00000000]
>>>>>    C2:                  <not supported>
>>>>>    C3:                  <not supported>
>>>>>
>>>>> I am currently NOT using APIC mode (nforce2, as well) and using 
>>>>> vanilla 2.6.4. It seems C1 halt state isn't used, which exlains why 
>>>>> I am having 
>>>
>>>
>>> [snip]
>>>
>>>>
>>>> Actually I think it is that we don't _count_ C1 usage.
>>>
>>>
>>> Hmm, OK, then I am really puzzled what specifically about mm sources 
>>> make my idle temps hotter, as I still couldn't properly resolve it 
>>> what is causing it. I thought ACPI, but no, using APM only does the 
>>> same (apm only with vanilla is low temp though.)
>>
>>
>>
>> Have you seen this thread, it may be relevant?
>> Re: [2.6.4-rc2] bogus semicolon behind if()
>> http://linux.derkeiler.com/Mailing-Lists/Kernel/2004-03/4170.html
> 
> 

So, I seem to have found the bugger causing higher temps: It is NVidia 
binary driver, or rather its AGP part of the 53.36 driver. Using AGPGART 
and Nvidia driver leaves my system cool. Using NVAGP it seems as though 
C1 state isn't actually used anymore thus making the CPU hotter.

Tested with (and without) ACPI and APIC (and Ross' tack patch). 
Currently running in PIC mode (with ACPI) and idle temp of 44?C (instead 
of about 50?C...). But it was as cool in APIC mode.

Of course I have to test few more days, but at least currently I am 
happy again. :-)

Prakash
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