linux-kernel - Re: [PATCH 4/4] Remove obsolete piece of PM documentation

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Message-ID: <20080612131253.GD5455@ucw.cz>
Date:	Thu, 12 Jun 2008 15:12:53 +0200
From:	Pavel Machek <pavel@...e.cz>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Len Brown <lenb@...nel.org>,
	pm list <linux-pm@...ts.linux-foundation.org>,
	Randy Dunlap <randy.dunlap@...cle.com>
Subject: Re: [PATCH 4/4] Remove obsolete piece of PM documentation

On Thu 2008-06-12 10:31:38, Rafael J. Wysocki wrote:
> From: Rafael J. Wysocki <rjw@...k.pl>
> 
> Remove an obsolete piece of PM documentation.
> 
> Signed-off-by: Rafael J. Wysocki <rjw@...k.pl>
> ---
>  Documentation/power/pm.txt |  257 ---------------------------------------------
>  1 file changed, 257 deletions(-)
> 
> Index: linux-2.6/Documentation/power/pm.txt
> ===================================================================
> --- linux-2.6.orig/Documentation/power/pm.txt
> +++ /dev/null
> @@ -1,257 +0,0 @@
> -               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.

ACK on rest.
							Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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