From owner-freebsd-acpi@FreeBSD.ORG  Mon Dec 13 20:12:32 2004
Return-Path: <owner-freebsd-acpi@FreeBSD.ORG>
Delivered-To: freebsd-acpi@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id C63FF16A4CE
	for <acpi@FreeBSD.ORG>; Mon, 13 Dec 2004 20:12:32 +0000 (GMT)
Received: from harmony.village.org (rover.village.org [168.103.84.182])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 7010443D39
	for <acpi@FreeBSD.ORG>; Mon, 13 Dec 2004 20:12:32 +0000 (GMT)
	(envelope-from imp@bsdimp.com)
Received: from localhost (warner@rover2.village.org [10.0.0.1])
	by harmony.village.org (8.13.1/8.13.1) with ESMTP id iBDKAq5L082351;
	Mon, 13 Dec 2004 13:10:52 -0700 (MST)
	(envelope-from imp@bsdimp.com)
Date: Mon, 13 Dec 2004 13:10:52 -0700 (MST)
Message-Id: <20041213.131052.42773193.imp@bsdimp.com>
To: nate@root.org
From: "M. Warner Losh" <imp@bsdimp.com>
In-Reply-To: <41BDF6A7.3040702@root.org>
References: <20041213190604.GA81993@svm.csie.ntu.edu.tw>
	<20041213.121233.104111469.imp@harmony.village.org>
	<41BDF6A7.3040702@root.org>
X-Mailer: Mew version 3.3 on Emacs 21.3 / Mule 5.0 (SAKAKI)
Mime-Version: 1.0
Content-Type: Text/Plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
cc: acpi@FreeBSD.ORG
cc: rafan@infor.org
Subject: Re: current powerstate and manually turn on/off?
X-BeenThere: freebsd-acpi@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: ACPI and power management development <freebsd-acpi.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-acpi>,
	<mailto:freebsd-acpi-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-acpi>
List-Post: <mailto:freebsd-acpi@freebsd.org>
List-Help: <mailto:freebsd-acpi-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-acpi>,
	<mailto:freebsd-acpi-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Mon, 13 Dec 2004 20:12:32 -0000

In message: <41BDF6A7.3040702@root.org>
            Nate Lawson <nate@root.org> writes:
: Warner Losh wrote:
: >>By using sysctl, I do know what's the current powerstate
: >>of each device. I wounder is there any command or sysctl
: >>that can manually turn device on or off?
: > 
: > 
: > Not really, no.
: 
: I think this is something the drivers should handle and we don't need to 
: add user access to power states since it's probably the biggest way to 
: shoot yourself in the foot.  We already power down devices with no 
: driver attached and once drivers get smart about powering down devices 
: that are idle, this would cover all scenarios.

It would be nice to have a way to say "This is a really strong hint
that you are now idle, go to lowest power, highest latency to get out
of it mode."

Warner