From owner-freebsd-mobile@FreeBSD.ORG  Mon Oct 11 03:46:37 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 3013316A4CE
	for <freebsd-mobile@freebsd.org>;
	Mon, 11 Oct 2004 03:46:37 +0000 (GMT)
Received: from postal1.es.net (postal1.es.net [198.128.3.205])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 147D243D67
	for <freebsd-mobile@freebsd.org>;
	Mon, 11 Oct 2004 03:46:36 +0000 (GMT)	(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, 10 Oct 2004 20:46:36 -0700
Received: from ptavv (localhost [127.0.0.1])
	by ptavv.es.net (Tachyon Server) with ESMTP id 16B225D0A;
	Sun, 10 Oct 2004 20:46:36 -0700 (PDT)
To: Dennis Koegel <amf@hobbit.neveragain.de>
In-reply-to: Your message of "Sun, 10 Oct 2004 04:09:38 +0200."
             <20041010020938.GB13862@neveragain.de> 
Date: Sun, 10 Oct 2004 20:46:36 -0700
From: "Kevin Oberman" <oberman@es.net>
Message-Id: <20041011034636.16B225D0A@ptavv.es.net>
cc: Arne Schwabe <schwabe@uni-paderborn.de>
cc: freebsd-mobile@freebsd.org
Subject: Re: Thinkpad not going off while suspend 
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: Mon, 11 Oct 2004 03:46:37 -0000

> Date: Sun, 10 Oct 2004 04:09:38 +0200
> From: Dennis Koegel <amf@hobbit.neveragain.de>
> Sender: owner-freebsd-mobile@freebsd.org
> 
> Hi,
> 
> On Sat, Oct 09, 2004 at 06:30:47PM -0700, Bruce M Simpson wrote:
> > > I just stumbled about something interesting, my Thinkpad t40 does
> > > not turn the display off (backlight is turned off) if going into
> > > suspend (acpi S3). If you point rather bright lamp at the lcd you
> > > can still read it.
> > You don't specify which OS version you're running. Have you tried
> > acpi_video?
> 
> Actually, I have the same problem. I was googling for it this
> afternoon and found references to acpi_video, but settting the
> video.lcd0.active sysctl to =0 would output "...lcd0.active: 1 -> 1"
> and consequently do nothing. LCD remains powered.
> 
> Found users reporting this problem, but no solution to it.
> 
> I'm running 5.3-BETA7 (cvsup'd yesteday).

Try adding:
hw.acpi.reset_video=0
hw.syscons.sc_no_suspend_vtswitch=1
to /etc/sysctl.conf. I think the latter will do the trick, but the
former was needed on my T30 to resume the display correctly.
-- 
R. Kevin Oberman, Network Engineer
Energy Sciences Network (ESnet)
Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab)
E-mail: oberman@es.net			Phone: +1 510 486-8634