From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Mon, 27 Aug 2001 05:54:03 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Mon, 27 Aug 2001 05:53:54 -0400 Received: from app79.hitnet.RWTH-Aachen.DE ([137.226.181.79]:12554 "EHLO anduin.hitnet.rwth-aachen.de") by vger.kernel.org with ESMTP id ; Mon, 27 Aug 2001 05:53:45 -0400 Date: Mon, 27 Aug 2001 11:53:57 +0200 From: Jan Niehusmann To: "Grover, Andrew" Cc: Linux Kernel List Subject: Re: VCool - cool your Athlon/Duron during idle Message-ID: <20010827115357.A1335@gondor.com> In-Reply-To: <4148FEAAD879D311AC5700A0C969E89006CDE0B7@orsmsx35.jf.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4148FEAAD879D311AC5700A0C969E89006CDE0B7@orsmsx35.jf.intel.com> User-Agent: Mutt/1.3.20i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Aug 27, 2001 at 02:26:09AM -0700, Grover, Andrew wrote: > system's ACPI tables indicates they can be used. If you are attempting to > use C2 even if your system explicitly does not support it, you are asking > for trouble, just like AMD's errata says. Motherboard vendors may have disabled the bus disconnection because of a 3% performance hit, to make their boards look better in benchmarks. In that case, the system may run perfectly stable with disconnection reenabled. I agree that these experiments should not be performed on a production system :) > This results in better battery life on a laptop but that is irrelevant on a > desktop system. Well, I think saving ~55W is relevant, even on a desktop system. I plan to measure how much power these hacks really save, and if it's more than 10W, I think it's worth some more work in this area. Jan (asus writes that one of the problems that can happen with this power saving mode are the huge changes in power dissipation, from 60W to 5W and back - therefore I assume the power saving mode can save up to 55W)