From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760921AbYFZUcl (ORCPT ); Thu, 26 Jun 2008 16:32:41 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753753AbYFZUc3 (ORCPT ); Thu, 26 Jun 2008 16:32:29 -0400 Received: from ogre.sisk.pl ([217.79.144.158]:33028 "EHLO ogre.sisk.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753078AbYFZUc1 (ORCPT ); Thu, 26 Jun 2008 16:32:27 -0400 From: "Rafael J. Wysocki" To: Len Brown Subject: Re: [PATCH 4/4] Remove obsolete piece of PM documentation Date: Thu, 26 Jun 2008 22:34:08 +0200 User-Agent: KMail/1.9.6 (enterprise 20070904.708012) Cc: Pavel Machek , Randy Dunlap , LKML , pm list , Andrew Morton , ACPI Devel Maling List References: <200806121025.24668.rjw@sisk.pl> <20080612205118.GB11761@elf.ucw.cz> In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200806262234.09104.rjw@sisk.pl> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thursday, 26 of June 2008, Len Brown wrote: > > > > > > > - 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. It won't hurt to have the file, though. I have reworked the patch already and I'd rather not do that again the other way around. ;-) Thanks, Rafael