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Message-ID: <3BEF04AC.5070305@zaralinux.com>
Date: Mon, 12 Nov 2001 00:07:24 +0100
From: Jorge Nerin <comandante@zaralinux.com>
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To: Joel Jaeggli <joelja@darkwing.uoregon.edu>
CC: David Grant <davidgrant79@hotmail.com>, linux-kernel@vger.kernel.org
Subject: Re: Athlon cooling
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Joel Jaeggli wrote:

> CONFIG_APM_CPU_IDLE
> 
> in the apm setup...
> 
> clock throttling is a subject of some debate on the linux kernel list... ;) 
> but the apm idle call will at least idle the cpu once the idle loop has 
> been running for a while.
> 
> joelja
> 
> On Thu, 8 Nov 2001, David Grant wrote:
> 
> 
>>There is a program for Windows called CPUIdle, which cools the Athlon
>>tremendoulsy.  I can get my temp. from 52C down to 36C.  It makes the CPU
>>truly go idle.  Is there anything like this for Linux, and I'm wondering if
>>anyone knows the instructions (and/or signals) which could be used to put
>>the Athlon into this state.  I guess it's more of a question for some APM
>>guys, but I thought some people here might know the interface to the Athlon,
>>and might thus know how this software cooling works.  Actually the low-level
>>apm stuff is part of the kernel right?  so maybe this is on-topic.
>>
>>http://www.cpuidle.de/
>>
>>Cheers,
>>David Grant
>>
> 

It has been discused before, it seems that the athlon needs another step 
to really enter in power saving mode, I can't remember the details, but 
I think it was a pci register, and I also remember that some people saw 
corrupts pci tranfer, namely the exact situation was grabbing with a TV 
card.

So the decision was that if this corrupted pci transfers from a tv card 
it could do the same with a pci ide controler, and that was not 
considered safe.

But you should crawl the archives for the same url.

-- 
Jorge Nerin
<comandante@zaralinux.com>

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