From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1762219AbYFZToP (ORCPT ); Thu, 26 Jun 2008 15:44:15 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1763135AbYFZTk6 (ORCPT ); Thu, 26 Jun 2008 15:40:58 -0400 Received: from vms173005pub.verizon.net ([206.46.173.5]:36885 "EHLO vms173005pub.verizon.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932185AbYFZTky (ORCPT ); Thu, 26 Jun 2008 15:40:54 -0400 Date: Thu, 26 Jun 2008 15:40:19 -0400 (EDT) From: Len Brown Subject: Re: [PATCH 4/4] Remove obsolete piece of PM documentation In-reply-to: <20080612205118.GB11761@elf.ucw.cz> X-X-Sender: lenb@localhost.localdomain To: Pavel Machek Cc: "Rafael J. Wysocki" , Randy Dunlap , LKML , pm list , Andrew Morton , ACPI Devel Maling List Message-id: MIME-version: 1.0 Content-type: TEXT/PLAIN; charset=US-ASCII References: <200806121025.24668.rjw@sisk.pl> <20080612131253.GD5455@ucw.cz> <16803397.1213285081959.JavaMail.oracle@acsmt301.oracle.com> <200806122248.59621.rjw@sisk.pl> <20080612205118.GB11761@elf.ucw.cz> User-Agent: Alpine 1.10 (LFD 962 2008-03-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > > > > > - Linux Power Management Support > > > > > - > > > > > -This document briefly describes how to use power management with your > > > > > -Linux system and how to add power management support to Linux drivers. > > > > > - > > > > > -APM or ACPI? > > > > > ------------- > > > > > -If you have a relatively recent x86 mobile, desktop, or server system, > > > > > -odds are it supports either Advanced Power Management (APM) or > > > > > -Advanced Configuration and Power Interface (ACPI). ACPI is the newer > > > > > -of the two technologies and puts power management in the hands of the > > > > > -operating system, allowing for more intelligent power management than > > > > > -is possible with BIOS controlled APM. > > > > > - > > > > > -The best way to determine which, if either, your system supports is to > > > > > -build a kernel with both ACPI and APM enabled (as of 2.3.x ACPI is > > > > > -enabled by default). If a working ACPI implementation is found, the > > > > > -ACPI driver will override and disable APM, otherwise the APM driver > > > > > -will be used. > > > > > - > > > > > -No, sorry, you cannot have both ACPI and APM enabled and running at > > > > > -once. Some people with broken ACPI or broken APM implementations > > > > > -would like to use both to get a full set of working features, but you > > > > > -simply cannot mix and match the two. Only one power management > > > > > -interface can be in control of the machine at once. Think about it.. > > > > > > > > I'd keep this; it is still true, and we still support both. > > > > > > > > Maybe it should be moved into Doc*/power/apm.txt or something. > > > > > > Yes, if there is a good sub-directory for it, please put it there. I think this is already covered in the Kconfig help for ACPI and APM and doesn't need a Documentation file. -Len