From owner-freebsd-acpi@FreeBSD.ORG Thu Aug 2 17:08:53 2007 Return-Path: Delivered-To: acpi@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 1C98816A41B for ; Thu, 2 Aug 2007 17:08:53 +0000 (UTC) (envelope-from nate@root.org) Received: from root.org (root.org [67.118.192.226]) by mx1.freebsd.org (Postfix) with ESMTP id BCC4F13C465 for ; Thu, 2 Aug 2007 17:08:49 +0000 (UTC) (envelope-from nate@root.org) Received: (qmail 78036 invoked from network); 2 Aug 2007 17:08:49 -0000 Received: from pni-128-64-133-147.prioritynetworks.net (HELO ?10.0.0.78?) (nate-mail@128.64.133.147) by root.org with ESMTPA; 2 Aug 2007 17:08:49 -0000 Message-ID: <46B20F91.5080709@root.org> Date: Thu, 02 Aug 2007 10:08:33 -0700 From: Nate Lawson User-Agent: Thunderbird 2.0.0.4 (X11/20070617) MIME-Version: 1.0 To: "M. Warner Losh" References: <46AE58B5.3080506@gahr.ch> <46AE8F78.1060203@root.org> <20070801.211718.1683324313.imp@bsdimp.com> In-Reply-To: <20070801.211718.1683324313.imp@bsdimp.com> X-Enigmail-Version: 0.95.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: acpi@freebsd.org, freebsd-hackers@freebsd.org, ume@freebsd.org, gahr@gahr.ch Subject: Re: [patch] enhance powerd(8) to handle max temperature 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: Thu, 02 Aug 2007 17:08:53 -0000 M. Warner Losh wrote: > In message: <46AE8F78.1060203@root.org> > Nate Lawson writes: > : Hajimu UMEMOTO wrote: > : >>>>>> On Mon, 30 Jul 2007 23:31:33 +0200 > : >>>>>> Pietro Cerutti said: > : > gahr> My patch is really just a first draft that I wrote in order to have > : > gahr> feedbacks on the general idea to implement a temperature controlling > : > gahr> system inside powerd, and doesn't implement hysteresis as you noted, and > : > gahr> your feedback is that it's not a good idea, which I respect. > : > > : > It is rather backward, IMHO. I did implement a passive cooling > : > feature as an enhancement of powerd(8) like you did, during initial > : > phases. Then, I implemented it in our kernel as a result. > : > : I'll take a look at your patch. Umemoto-san is right in that you really > : want the kernel to control cooling. What happens if powerd dies/hangs > : and your system burns up? Passive cooling is often a last resort to > : keep the system from overheating. > > I keep getting the system shutting down on my HP by FreeBSD because > the temperature exceeds the _CRT value. Maybe there's something wrong > with my values, since it happens a lot: > > hw.acpi.thermal.min_runtime: 0 > hw.acpi.thermal.polling_rate: 10 > hw.acpi.thermal.user_override: 0 > hw.acpi.thermal.tz0.temperature: 0.0C > hw.acpi.thermal.tz0.active: -1 > hw.acpi.thermal.tz0.passive_cooling: 1 > hw.acpi.thermal.tz0.thermal_flags: 0 > hw.acpi.thermal.tz0._PSV: 90.0C > hw.acpi.thermal.tz0._HOT: -1 > hw.acpi.thermal.tz0._CRT: 94.0C > hw.acpi.thermal.tz0._ACx: 40.0C -1 -1 -1 -1 -1 -1 -1 -1 -1 > > Note: temperature is always 0.0C. > > What can I do to help my situation, if I really want the kernel doing > the cooling? Your embedded controller is timing out. Thus you're getting a bogus value for _TMP. Those settings for _CRT appear correct. It's the "measured" temperature that is wrong. -Nate