Re: idle Athlon with IOAPIC is 10C warmer since 2.6.3-bk1

[Prakash K. Cheemplavam]

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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