From owner-freebsd-questions@FreeBSD.ORG Mon Mar 31 01:41:16 2014 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id C892B143 for ; Mon, 31 Mar 2014 01:41:16 +0000 (UTC) Received: from mail-pa0-x235.google.com (mail-pa0-x235.google.com [IPv6:2607:f8b0:400e:c03::235]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 9C819345 for ; Mon, 31 Mar 2014 01:41:16 +0000 (UTC) Received: by mail-pa0-f53.google.com with SMTP id ld10so7487405pab.12 for ; Sun, 30 Mar 2014 18:41:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=message-id:date:from:user-agent:mime-version:to:subject:references :in-reply-to:content-type:content-transfer-encoding; bh=11/F6IRz2pVmUDp21nWP9O0SYtk63ygw2VJIUibujq4=; b=LmAPRn1ZO/OVhXw1kap8MZKYL8qCCJ7J9JInMoS7ySm+x1AFqaiN9Z+xiZoU/+xvmh fQKncDMn7t/aGMWdTSztji4KchjrtWTWwkXx+buAfvRD74whwgAEjCvAjDpm4/6+boid HjQ6mRtg1McFdhT4VQLn/u+o6ulkkWIHyMMmrtRmUdoIkh3waaeTep5lQbz9fG9GKeXl 87KpUjjDZ06H0p/GI2lxO83ekNmOuy14ctPOHHIaoQ/7oFyI9EfeRsr0S2oDlIJIwL1d dC7LqC9Yeb+dh71h8NaNlL/SO3QhgntVcy4ocKwEYnF0glVSKHtyCZ34jg//iP3qpdb9 6PWA== X-Received: by 10.68.105.36 with SMTP id gj4mr22093872pbb.64.1396230075138; Sun, 30 Mar 2014 18:41:15 -0700 (PDT) Received: from [192.168.0.5] ([174.134.108.115]) by mx.google.com with ESMTPSA id it4sm39747469pbd.48.2014.03.30.18.41.14 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Sun, 30 Mar 2014 18:41:14 -0700 (PDT) Message-ID: <5338C7B9.4050208@gmail.com> Date: Sun, 30 Mar 2014 18:41:13 -0700 From: Edward M User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:24.0) Gecko/20100101 Thunderbird/24.4.0 MIME-Version: 1.0 To: freebsd-questions@freebsd.org Subject: Re: CPU Overheating? References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.17 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 31 Mar 2014 01:41:16 -0000 On 3/30/2014 5:11 PM, Walter Hurry wrote: > I have a bog-standard Acer laptop with FreeBSD 9.2 (amd64). > > CPU is AMD Athlon(tm) 64 X2 Dual-Core Processor TK-42 (1596.09-MHz K8-class CPU) per dmsg. > > From time to time, it shuts off without warning, as if the power cable has been pulled out. Nothing in any of the logs, and when I power up again it starts normally after replaying the journal. > > The shut-off is invariably when it is doing a compile of a big port. I therefore suspect that the CPU is overheating and that the BIOS is causing the shutdown. > > To investigate the problem, I have done a 'kldload coretemp' and am periodically running: > 'sysctl hw.acpi.thermal.tz0.temperature'. So far (only 6 runs) this is reporting temperatures between 76C and 84C. > > Question 1: Is this the canonical way to monitor CPU temperature? > Question 2: Is this too hot? > Question 3: I plan to load the module in /boot/loader.conf and set up a cron job to run every minute and log the result to a file. Is this sensible, or overkill? > > Thanks. Hello, Possibility, the CPU fan/heatsink housing has collected dust and it is causing the CPU to overhead during compiling, however cools off later? Best regards, ed