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SubjectRe: idle Athlon with IOAPIC is 10C warmer since 2.6.3-bk1
Ross Dickson wrote:
> On Tuesday 30 March 2004 05:59, Prakash K. Cheemplavam wrote:
>
>>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.
>
>
> Hmmm.
> Would you happen to have a copy of athcool handy - it would be interesting to
> see the northbridge disconnect bit status - if its been turned off by their driver?

That is the funny thing: Athcool reports it is on. So something from
their AGP code seems to prevent the CPU going "full idle", I guess.
Well, now I am using 53.41 driver with agpgart and everything finally
seems to be stable, cool and nice. :)

Prakash
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