From mboxrd@z Thu Jan 1 00:00:00 1970 From: Erik Slagter Subject: Re: Save power at idle onTyan S2466N-MPX, athcool, etc. Date: Thu, 06 Oct 2005 10:09:44 +0200 Message-ID: <1128586184.5964.22.camel@localhost.localdomain> References: Mime-Version: 1.0 Content-Type: multipart/signed; micalg=sha1; protocol="application/x-pkcs7-signature"; boundary="=-hzqWL4s1FVuwMG7aANey" Return-path: In-Reply-To: Sender: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Errors-To: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: David Mathog Cc: acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: linux-acpi@vger.kernel.org --=-hzqWL4s1FVuwMG7aANey Content-Type: text/plain Content-Transfer-Encoding: quoted-printable On Wed, 2005-10-05 at 09:33 -0700, David Mathog wrote: > > We had a discussion about exactly this a few weeks ago. > >=20 > > 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 motherboar= d > > prevent C2/C3 from being used by ACPI processor support. > >=20 > > So, out of the box you have C1, using the amd76x_pm you also have C2 an= d > > optionally C3 support (although that completely screws up my sata > > controller). >=20 > 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.) >=20 > 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: >=20 > 1. relevant BIOS settings > 2. minimum kernel required > 3. any extra kernel patches required > 4. any extra software (like athcool) required >=20 > 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. 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