Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263526AbUAOVJ6 (ORCPT ); Thu, 15 Jan 2004 16:09:58 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262540AbUAOVJ5 (ORCPT ); Thu, 15 Jan 2004 16:09:57 -0500 Received: from atrey.karlin.mff.cuni.cz ([195.113.31.123]:36331 "EHLO atrey.karlin.mff.cuni.cz") by vger.kernel.org with ESMTP id S263726AbUAOVIB (ORCPT ); Thu, 15 Jan 2004 16:08:01 -0500 Date: Thu, 15 Jan 2004 21:42:57 +0100 From: Pavel Machek To: Robert Love Cc: Daniel Gryniewicz , Dave Jones , Matthew Garrett , linux-kernel@vger.kernel.org Subject: Re: Laptops & CPU frequency Message-ID: <20040115204257.GG467@openzaurus.ucw.cz> References: <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> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1074107842.1153.959.camel@localhost> User-Agent: Mutt/1.3.27i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 883 Lines: 22 Hi! > > I have an athlon-xp laptop (HP pavilion ze4500) with powernow that > > definitely goes into low power mode when the plug is pulled. The screen > > goes dark, and everything slows down. > > 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. People are designing machines where battery can't provide enough ampers for cpu in high-power mode. If speedstep machines have same problem, SMM is actually right thing to do. Pavel -- 64 bytes from 195.113.31.123: icmp_seq=28 ttl=51 time=448769.1 ms - 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/