From owner-freebsd-acpi@FreeBSD.ORG Mon Sep 25 13:29:42 2006 Return-Path: X-Original-To: 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 5E0E116A40F for ; Mon, 25 Sep 2006 13:29:42 +0000 (UTC) (envelope-from anderson@centtech.com) Received: from mh2.centtech.com (moat3.centtech.com [207.200.51.50]) by mx1.FreeBSD.org (Postfix) with ESMTP id C2CAE43D4C for ; Mon, 25 Sep 2006 13:29:41 +0000 (GMT) (envelope-from anderson@centtech.com) Received: from [10.177.171.220] (neutrino.centtech.com [10.177.171.220]) by mh2.centtech.com (8.13.1/8.13.1) with ESMTP id k8PDTTVt049901; Mon, 25 Sep 2006 08:29:29 -0500 (CDT) (envelope-from anderson@centtech.com) Message-ID: <4517D9B9.3080401@centtech.com> Date: Mon, 25 Sep 2006 08:29:29 -0500 From: Eric Anderson User-Agent: Thunderbird 1.5.0.7 (X11/20060923) MIME-Version: 1.0 To: David Wolfskill References: <20060916234642.GC698@bunrab.catwhisker.org> <20060922140804.GA12665@bunrab.catwhisker.org> In-Reply-To: <20060922140804.GA12665@bunrab.catwhisker.org> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Virus-Scanned: ClamAV 0.87.1/1942/Mon Sep 25 04:36:21 2006 on mh2.centtech.com X-Virus-Status: Clean Cc: acpi@freebsd.org Subject: Re: Avoiding "WARNING: system temperature too high, shutting down soon!"? X-BeenThere: freebsd-acpi@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: ACPI and power management development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 25 Sep 2006 13:29:42 -0000 On 09/22/06 09:08, David Wolfskill wrote: > On Sat, Sep 16, 2006 at 04:46:42PM -0700, David Wolfskill wrote: >> I could use some help: I seem to overheat my laptop; I'd like to get >> some idea of how to avoid the overheating, preferably while still >> getting the work done. >> ... > > I received several useful suggestions, and I have the problem mitigated > while I await word from places that advertise that they will do laptop > repairs. [..snip..] > Alexandre "Sunny" Kovalenko discussed the issues at some length, and > provided a patch to powerd(8) to cap the CPU frequency at or above a > certain temperature. As with the "passive cooling," I have not yet > needed that, so I haven't tested it. > > If there's interest in the patch to powerd(8), I could test it & submit > a PR -- but I'd rather not if there's not much interest. I think is interesting - it would be nice to have something like that, at least as an option to powerd. I think linux does something like this. Another thing I just thought of, was to have two debug.cpufreq.lowest settings, like debug.cpufreq.lowest.battery and debug.cpufreq.lowest.ac so that one could have a cooler quieter system while plugged in, but still get fast enough performance, yet have a lower speed setting for battery usage. If that sounds useful to others, maybe I'll write a patch. Eric -- ------------------------------------------------------------------------ Eric Anderson Sr. Systems Administrator Centaur Technology Anything that works is better than anything that doesn't. ------------------------------------------------------------------------