From owner-freebsd-questions@FreeBSD.ORG  Thu Jul 26 19:22:10 2007
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
Delivered-To: questions@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 2A73D16A417
	for <questions@freebsd.org>; Thu, 26 Jul 2007 19:22:10 +0000 (UTC)
	(envelope-from youshi10@u.washington.edu)
Received: from mxout4.cac.washington.edu (mxout4.cac.washington.edu
	[140.142.33.19])
	by mx1.freebsd.org (Postfix) with ESMTP id 0C92713C461
	for <questions@freebsd.org>; Thu, 26 Jul 2007 19:22:10 +0000 (UTC)
	(envelope-from youshi10@u.washington.edu)
Received: from hymn03.u.washington.edu (hymn03.u.washington.edu
	[140.142.12.169])
	by mxout4.cac.washington.edu (8.13.7+UW06.06/8.13.7+UW07.06) with ESMTP
	id l6QJM9qm000801
	(version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO);
	Thu, 26 Jul 2007 12:22:09 -0700
Received: from localhost (localhost [127.0.0.1])
	by hymn03.u.washington.edu (8.13.7+UW06.06/8.13.7+UW07.03) with ESMTP
	id l6QJM88D032195; Thu, 26 Jul 2007 12:22:08 -0700
X-Auth-Received: from [192.55.52.10] by hymn03.u.washington.edu via HTTP;
	Thu, 26 Jul 2007 12:22:08 PDT
Date: Thu, 26 Jul 2007 12:22:08 -0700 (PDT)
From: youshi10@u.washington.edu
To: "V.I.Victor" <idmc_vivr@intgdev.com>
In-Reply-To: <W7051626979317091185470942@webmail24>
Message-ID: <Pine.LNX.4.43.0707261222080.27112@hymn03.u.washington.edu>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed
X-PMX-Version: 5.3.2.304607, Antispam-Engine: 2.5.1.298604,
	Antispam-Data: 2007.7.26.115732
X-Uwash-Spam: Gauge=IIIIIII, Probability=7%, Report='NO_REAL_NAME 0, __CT 0,
	__CT_TEXT_PLAIN 0, __HAS_MSGID 0, __MIME_TEXT_ONLY 0,
	__MIME_VERSION 0, __SANE_MSGID 0'
Cc: questions@freebsd.org
Subject: Re: ACPI slowing CPU... or something else
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
	<mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions>
List-Post: <mailto:freebsd-questions@freebsd.org>
List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
	<mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 26 Jul 2007 19:22:10 -0000

On Thu, 26 Jul 2007, V.I.Victor wrote:

> On Thu, 26 Jul 2007, Manolis Kiagias wrote:
>
>> V.I.Victor wrote: I was wondering about the "truth-of-clockspeed."
>
>>> Perhaps the 1800-MHz only applies to CPU internal cache, etc. while
>>> the external bus-clocking is down at 500-MHz or so.  Sounds like a
>>> typical marketing ploy!
>>>
>>> About disabling the ACPI...  Can I do it *safely* via the remote-ssh
>>> connection?  Or do I need to be at the box w/ keyboard and monitor?
>>> What I've read makes it seem that the ACPI is set at boot-time.
>>>
>> If you don't mind rebooting the remote machine, add:
>>
>> hint.acpi.0.disabled="1"
>>
>> to /boot/device.hints and reboot
>
> Although I've re-booted remotely, I've never done it after a boot modification.  It's probably prudent to wait 'til the weekend to try this -- mistakes are easier to deal with!
>
> Thanks for the info.

All that rebooting remotely in this case will result in is ACPI being disabled :).. you should be able to disable ACPI from the BIOS as well, if you like.

-Garrett