From owner-freebsd-acpi@FreeBSD.ORG Sat Apr 3 05:01:32 2010 Return-Path: Delivered-To: freebsd-acpi@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 91689106564A for ; Sat, 3 Apr 2010 05:01:32 +0000 (UTC) (envelope-from freebsd@chillt.de) Received: from dd15624.kasserver.com (dd15624.kasserver.com [85.13.136.215]) by mx1.freebsd.org (Postfix) with ESMTP id 5282F8FC08 for ; Sat, 3 Apr 2010 05:01:32 +0000 (UTC) Received: from taiko.lan (84-203-79-36.mysmart.ie [84.203.79.36]) by dd15624.kasserver.com (Postfix) with ESMTP id D3B8D2C083C43; Sat, 3 Apr 2010 07:01:30 +0200 (CEST) Message-ID: <4BB6CBA5.6090000@chillt.de> Date: Sat, 03 Apr 2010 06:01:25 +0100 From: Bartosz Fabianowski User-Agent: Mozilla/5.0 (X11; U; FreeBSD amd64; en-US; rv:1.9.1.9) Gecko/20100403 Thunderbird/3.0.4 MIME-Version: 1.0 To: Ian Smith References: <4BB69279.6060005@chillt.de> <20100403152134.V35463@sola.nimnet.asn.au> In-Reply-To: <20100403152134.V35463@sola.nimnet.asn.au> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Cc: freebsd-acpi@freebsd.org Subject: Re: Spurious thermal shutdowns on Dell Studio 1557 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: Sat, 03 Apr 2010 05:01:32 -0000 > You should hear the fan come on at 55C, and run faster at 71C, as > active cooling is also on. Is that happening? Temperature never drops below 55°C and so the fan is always running. As far as memory serves me, this has been the case since day one. I have not noticed any difference in fan noise at different temperature levels. Considering how hot this machine is running, I would not be surprised if the fan was always in its "high" setting. > If the fan is running properly, have you checked that the airways > aren't blocked by dust and/or fluff? The laptop has feet of ~5mm height. I have extended that to about 1cm by placing the computer on four stacks of post-it notes. This, again, has been the case since day one. I added a few more millimeters of post-it notes today and cleaned out any dust I could find. This might have improved things slightly but temperature still exceeds 85°C when compiling larger ports. > Maybe Dell don't trust non-Windows OS to take care of passive > cooling? Could be worth seeing if those values come up the same if > you spoof some type of Windows as your OS, as detailed in the ACPI > debugging section? Yes, this is definitely something I will try. I thought that all the magic would be present in the DSDT. But now that I think about it, of course the BIOS could be changing the values read from the GNVS table based on OS. I will try spoofing Vista or Windows 7 and report back my findings. - Bartosz