Re: Save power at idle onTyan S2466N-MPX, athcool, etc.

[Erik Slagter <erik-KW7PGP3XNp7a5EbDDlwbIw@public.gmane.org>]

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On Wed, 2005-10-05 at 09:33 -0700, David Mathog wrote:

> > We had a discussion about exactly this a few weeks ago.
> > 
> > It boils down to: the AMD768 chipset can do C1/C2/C3 but not out of the
> > box using ACPI. First because ACPI processor support did not support
> > multiprocessor, now it does, but the ACPI parameters of this motherboard
> > prevent C2/C3 from being used by ACPI processor support.
> > 
> > So, out of the box you have C1, using the amd76x_pm you also have C2 and
> > optionally C3 support (although that completely screws up my sata
> > controller).
> 
> Got it, there are problems with ACPI and the S2466.  No big surprise
> there since this board has all sorts of oddball problems.  (No WOL
> etc.)
> 
> However, it sounded like you and others managed in the end
> obtain some power savings at idle.  Correct?  If so,
> could you or some other poster please explain how you accomplished
> that, stating in particular:
> 
> 1. relevant BIOS settings
> 2. minimum kernel required
> 3. any extra kernel patches required
> 4. any extra software (like athcool) required
> 
> The machines in question are single CPU beowulf nodes - they do
> have an S3 video card but it is used only when there are
> hardware problems and/or to change the BIOS.  So maybe
> once every two years.  There's no sound, TV card, video streams,
> or anything else like that.  These just sit around until a
> compute job comes through, then they grind like crazy for a while.
> It would be nice if they used less power while they were waiting.

Please search the mailing list archives for something like amd760,
amd768, amd76x_pm, smp, or simply my name. This has all been covered.

BTW I have had several stability issues with the board, so I am not
going to buy another Tyan board. My previous MSI board always worked
without any problem.

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