From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261187AbVGYKVP (ORCPT ); Mon, 25 Jul 2005 06:21:15 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261191AbVGYKVP (ORCPT ); Mon, 25 Jul 2005 06:21:15 -0400 Received: from ylpvm12-ext.prodigy.net ([207.115.57.43]:55955 "EHLO ylpvm12.prodigy.net") by vger.kernel.org with ESMTP id S261187AbVGYKVO (ORCPT ); Mon, 25 Jul 2005 06:21:14 -0400 Date: Mon, 25 Jul 2005 03:21:04 -0700 From: Tony Lindgren To: Voluspa Cc: Pavel Machek , jesper.juhl@gmail.com, linux-kernel@vger.kernel.org Subject: Re: 2.6.13-rc3 Battery times at 100/250/1000 Hz = Zero difference Message-ID: <20050725102103.GG5837@atomide.com> References: <20050721200448.5c4a2ea0.lista1@telia.com> <9a8748490507211114227720b0@mail.gmail.com> <20050722144855.GA2036@elf.ucw.cz> <20050722191510.5e120515.voluspa@telia.com> <20050722180236.GA615@atrey.karlin.mff.cuni.cz> <20050722204439.54a63a00.lista1@telia.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20050722204439.54a63a00.lista1@telia.com> User-Agent: Mutt/1.5.6+20040907i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org * Voluspa [050722 11:46]: > On Fri, 22 Jul 2005 20:02:36 +0200 Pavel Machek wrote: > > will not help. It seems like your machine is simply not able to do > > reasonable powersaving. > > Digging up this patch from last month regarding C2 on a AMD K7 implies > that the whole blame can be put on kernel acpi: > > http://marc.theaimsgroup.com/?l=linux-kernel&m=111933745131301&w=2 AFAIK Linux ACPI expects BIOS to contain all the necessary stuff to enable C2 and C3. Otherwise they won't get enabled, and you have to create a custom module like the amd76x_pm is. There's been some talk on adding a module to enable C2 and C3 states for various chipsets, but nobody seems to have enough time to do it... Tony