From owner-freebsd-questions@FreeBSD.ORG Wed May 9 11:56:27 2012 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id C1113106564A for ; Wed, 9 May 2012 11:56:27 +0000 (UTC) (envelope-from cwhiteh@onetel.com) Received: from anakin.london.02.net (anakin.london.02.net [87.194.255.134]) by mx1.freebsd.org (Postfix) with ESMTP id 559B98FC14 for ; Wed, 9 May 2012 11:56:26 +0000 (UTC) Received: from muji2.config (87.194.237.233) by anakin.london.02.net (8.5.140) id 4EEB63D202BD3FD7 for freebsd-questions@freebsd.org; Wed, 9 May 2012 12:56:19 +0100 Message-ID: <4FAA5B63.3010307@onetel.com> Date: Wed, 09 May 2012 12:56:19 +0100 From: Chris Whitehouse User-Agent: Mozilla/5.0 (X11; U; FreeBSD i386; en-US; rv:1.9.2.9) Gecko/20100924 Thunderbird/3.1.4 MIME-Version: 1.0 To: freebsd-questions@freebsd.org References: <20120501120654.GA4883@mech-cluster241.men.bris.ac.uk> <20120501124110.GB5007@mech-cluster241.men.bris.ac.uk> <4FA032AE.8050902@onetel.com> <20120508140604.GA12758@mech-cluster241.men.bris.ac.uk> In-Reply-To: <20120508140604.GA12758@mech-cluster241.men.bris.ac.uk> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Subject: Re: ACPI temprature settings [WAS: Re: laptop very hot and noisy] X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 09 May 2012 11:56:27 -0000 On 08/05/2012 15:06, Anton Shterenlikht wrote: > Anyway, this was easier than I expected. > I removed a lot of dust from the fan > and the heat sink gills. I also replaced > the "thermal material". I prop my mine up off the desk to get better airflow to the fan intake which is on the underside. The fan slows down when I lift it up indicating it is moving more air. > > I rebuilt gcc47 and saw the highest temperature of 75. > This is on the southern side, so not too bad. The > noise reduced too. > > Now, I'd just like to understand better the > meaning of these console messages: > > May 8 15:00:08 mech-aslap239 kernel: acpi_tz0: _AC3: temperature 64.0>= setpoint 40.0 > May 8 15:00:08 mech-aslap239 kernel: acpi_tz0: _AC2: temperature 64.0>= setpoint 50.0 > May 8 15:00:18 mech-aslap239 kernel: acpi_tz0: _AC3: temperature 64.0>= setpoint 40.0 > May 8 15:00:18 mech-aslap239 kernel: acpi_tz0: _AC2: temperature 64.0>= setpoint 50.0 > May 8 15:00:28 mech-aslap239 kernel: acpi_tz0: _AC3: temperature 64.0>= setpoint 40.0 > May 8 15:00:28 mech-aslap239 kernel: acpi_tz0: _AC2: temperature 64.0>= setpoint 50.0 > May 8 15:00:38 mech-aslap239 kernel: acpi_tz0: _AC3: temperature 64.0>= setpoint 40.0 > May 8 15:00:38 mech-aslap239 kernel: acpi_tz0: _AC2: temperature 64.0>= setpoint 50.0 > May 8 15:00:48 mech-aslap239 kernel: acpi_tz0: _AC3: temperature 65.0>= setpoint 40.0 > May 8 15:00:48 mech-aslap239 kernel: acpi_tz0: _AC2: temperature 65.0>= setpoint 50.0 > > Where are setpoints defined? > What's acpi_tz? > What are AC1, AC2, AC3? > Which kernel tunables are involved in the > switching from one fan speed to another > (assuming AC1, AC2, AC3 are related to fan > speed in some way)? > > I had a quick look at ⌡aacpi(4), > but none of the above are mentioned. > > Many thanks for all your help. > Google for "acpi_tz0: _CRT value is absurd, ignored" and you will find a long thread with some hopefully useful pointers. You may need to bone up on the ACPI reference and custom ASL's for FreeBSD. I've forgotten most of it now but I think you will find references for both of them in that thread. Chris