Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S264359AbUANT05 (ORCPT ); Wed, 14 Jan 2004 14:26:57 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263609AbUANTYa (ORCPT ); Wed, 14 Jan 2004 14:24:30 -0500 Received: from relay.pair.com ([209.68.1.20]:2828 "HELO relay.pair.com") by vger.kernel.org with SMTP id S263893AbUANTXa (ORCPT ); Wed, 14 Jan 2004 14:23:30 -0500 X-pair-Authenticated: 68.42.66.6 Subject: Re: Laptops & CPU frequency From: Daniel Gryniewicz To: Robert Love Cc: Dave Jones , Matthew Garrett , linux-kernel@vger.kernel.org In-Reply-To: <1074107842.1153.959.camel@localhost> References: <20040111025623.GA19890@ncsu.edu> <20040111025623.GA19890@ncsu.edu> <1073791061.1663.77.camel@localhost> <1073841200.1153.0.camel@localhost> <1073843690.1153.12.camel@localhost> <20040114045945.GB23845@redhat.com> <1074107508.4549.10.camel@localhost> <1074107842.1153.959.camel@localhost> Content-Type: text/plain Content-Transfer-Encoding: 7bit Message-Id: <1074108207.5935.15.camel@localhost> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.4.5 Date: Wed, 14 Jan 2004 14:23:27 -0500 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1100 Lines: 25 On Wed, 2004-01-14 at 14:17, Robert Love wrote: > Dave did not mean that the other power management schemes cannot do the > automatic reduction on loss of AC, just that there is no SMM/BIOS hacks > to do it automatically. > > Your APM scripts are probably adjusting your CPU speed when you go on > AC. Fedora does this, for example. No APM scripts, no APM even. I have ACPI, but no acpid, and I don't currently do anything with ACPI other than get battery status and temperature. It also happened before I built in any cpufreq support. > That is cool - the OS (user-space, even) controls the policy. > > What we don't like is how SpeedStep can be controlled from SMM. This happens even booted into DOS, so it's definitely a BIOS thing. I haven't looked into turning it off, I can check next time I reboot. -- Daniel Gryniewicz - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/