From owner-freebsd-mobile@FreeBSD.ORG  Sun May  2 15:23:28 2004
Return-Path: <owner-freebsd-mobile@FreeBSD.ORG>
Delivered-To: freebsd-mobile@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 0271116A4CE
	for <freebsd-mobile@freebsd.org>;
	Sun,  2 May 2004 15:23:28 -0700 (PDT)
Received: from postal1.es.net (postal1.es.net [198.128.3.205])
	by mx1.FreeBSD.org (Postfix) with ESMTP id CE31443D48
	for <freebsd-mobile@freebsd.org>;
	Sun,  2 May 2004 15:23:27 -0700 (PDT)	(envelope-from oberman@es.net)
Received: from ptavv.es.net ([198.128.4.29])
        by postal1.es.net (Postal Node 1) with ESMTP (SSL) id IBA74465;
        Sun, 02 May 2004 15:23:27 -0700
Received: from ptavv (localhost [127.0.0.1])
	by ptavv.es.net (Tachyon Server) with ESMTP
	id 304EC5D07; Sun,  2 May 2004 15:23:27 -0700 (PDT)
To: James Snow <snow@teardrop.org>
In-reply-to: Your message of "Sun, 02 May 2004 01:22:51 EDT."
             <20040502052251.GA39933@teardrop.org> 
Date: Sun, 02 May 2004 15:23:27 -0700
From: "Kevin Oberman" <oberman@es.net>
Message-Id: <20040502222327.304EC5D07@ptavv.es.net>
cc: Markie <mark.cullen@dsl.pipex.com>
cc: freebsd-mobile@freebsd.org
Subject: Re: Laptop ACPI question 
X-BeenThere: freebsd-mobile@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: Mobile computing with FreeBSD <freebsd-mobile.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-mobile>,
	<mailto:freebsd-mobile-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-mobile>
List-Post: <mailto:freebsd-mobile@freebsd.org>
List-Help: <mailto:freebsd-mobile-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-mobile>,
	<mailto:freebsd-mobile-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sun, 02 May 2004 22:23:28 -0000

> Date: Sun, 2 May 2004 01:22:51 -0400
> From: James Snow <snow@teardrop.org>
> 
> On Sat, May 01, 2004 at 02:05:36PM -0700, Kevin Oberman wrote:
> > 
> > Actually, ACPI will greatly improve battery life soon, but not yet. The
> > bits and pieces are being fed into CURRENT and I suspect that SpeedStep
> > support will be coming soon.
> > In the meantime, you can use sysctls to manually adjust CPU performance
> > to enhance battery life.
> > 
> > Look at:
> > hw.acpi.cpu.throttle_max: 8
> > hw.acpi.cpu.throttle_state: 8
> > hw.acpi.cpu.cx_supported: C1/0 C2/1 C3/85
> > hw.acpi.cpu.cx_lowest: 0
> > hw.acpi.cpu.cx_history: 1453705/0 0/0 0/0
> 
> Hmm. In 5.2.1-p5, I don't have anything under hw.acpi.cpu
> labeled .throttle*. I do, however, have these:
> 
> hw.acpi.cpu.max_speed: 8
> hw.acpi.cpu.current_speed: 1
> hw.acpi.cpu.performance_speed: 8
> hw.acpi.cpu.economy_speed: 1
> 
> acpi(4) seems to suggest that these will alter CPU speed,
> and presumably battery life as well. Is this not the case?

I suspect that this simply indicates differences between systems. These
settings look a lot like the older, less granular APM controlled
services. I'd certainly try adjusting hw.acpi.cpu.current_speed and see
what effect it has, but it looks to me like it's running at its economy
mode, already.