From owner-freebsd-questions@freebsd.org Sun Jul 17 15:46:42 2016 Return-Path: Delivered-To: freebsd-questions@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 5E18BB9C87B for ; Sun, 17 Jul 2016 15:46:42 +0000 (UTC) (envelope-from freebsd@qeng-ho.org) Received: from bede.qeng-ho.org (bede.qeng-ho.org [217.155.128.241]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "fileserver.home.qeng-ho.org", Issuer "fileserver.home.qeng-ho.org" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id DF7AB196A for ; Sun, 17 Jul 2016 15:46:41 +0000 (UTC) (envelope-from freebsd@qeng-ho.org) Received: from arthur.home.qeng-ho.org (arthur.home.qeng-ho.org [172.23.1.2]) by bede.home.qeng-ho.org (8.15.2/8.15.2) with ESMTP id u6HFiQGN071168; Sun, 17 Jul 2016 16:44:26 +0100 (BST) (envelope-from freebsd@qeng-ho.org) Subject: Re: High CPU temperature and high fans level To: "William A. Mahaffey III" , freebsd-questions@freebsd.org References: <20160717002508.591a61ce.freebsd@edvax.de> <2ab232fb-0476-a5be-a9ad-14b9c63adcef@hiwaay.net> From: Arthur Chance Message-ID: <899e0044-6016-4b47-aade-5d701766c0e0@qeng-ho.org> Date: Sun, 17 Jul 2016 16:44:26 +0100 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:45.0) Gecko/20100101 Thunderbird/45.1.1 MIME-Version: 1.0 In-Reply-To: <2ab232fb-0476-a5be-a9ad-14b9c63adcef@hiwaay.net> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 17 Jul 2016 15:46:42 -0000 On 17/07/2016 13:48, William A. Mahaffey III wrote: > On 07/17/16 05:05, David Demelier wrote: >> 2016-07-17 0:25 GMT+02:00 Polytropon : >>> On Sun, 17 Jul 2016 00:06:07 +0200, David Demelier wrote: >>>> Hello, >>>> >>>> I was trying FreeBSD 10.3 on my laptop (hp probook 4510s) and was >>>> surprised >>>> to see high CPU temperature and fans running high. >>>> >>>> No apps running, I get a temperature of 57C in dev.cpu.x.temperature >>>> and >>>> fans run high (not able to get rpms). >>>> >>>> On a 4.6.3 Linux distro I get an average of 48C and fans are quite low. >>>> >>>> Both tests were kept in tty. No Xorg running just a boot and user >>>> login in >>>> console. >>>> >>>> Do you have any clue? >>> Did you enable powerd? It can slow down the CPU when the system >>> is idle, and increase the CPU speed when needed. This should have >>> an effect on CPU temperature and fan speed. >>> >> Yes, I had powerd enabled, I tried -a adaptive, -a hiadaptive as >> suggested by Erich but it seems that only -a min has some little >> effect. I could get a temperature of 52C. I've tested back on Linux >> and I got an average much lower (41C). >> >> By the way the other sensors in hw.acpi.tz* are also much higher than >> Linux (using lm_sensors). The highest value is my tz5 which is at 78C >> almost 5 seconds after boot while the maximum tz value in Linux >> sensors is 55. >> >> I have no idea what's wrong. :( >> > > I have had issues w/ FreeBSD apparently not reporting accurate temps on > this box, AMD jaguar desktop, FreeBSD 9.3R. YMMV & all that rot .... > Ditto. This is a small and old Atom based Zotac system running 10.2: root@zotac:0# sysctl dev.cpu|grep temperature dev.cpu.3.temperature: 24.0C dev.cpu.2.temperature: 24.0C dev.cpu.1.temperature: 27.0C dev.cpu.0.temperature: 27.0C The digital thermometer right next to it is reporting 33.9C in my office (we're having a hot spell by our standards). There's no way the CPU can be colder than the ambient temperature. -- Moore's Law of Mad Science: Every eighteen months, the minimum IQ necessary to destroy the world drops by one point.