Date: Sun, 17 Jul 2016 16:44:26 +0100 From: Arthur Chance <freebsd@qeng-ho.org> To: "William A. Mahaffey III" <wam@hiwaay.net>, freebsd-questions@freebsd.org Subject: Re: High CPU temperature and high fans level Message-ID: <899e0044-6016-4b47-aade-5d701766c0e0@qeng-ho.org> In-Reply-To: <2ab232fb-0476-a5be-a9ad-14b9c63adcef@hiwaay.net> References: <CAO%2BPfDe_Bs=OyN39UxKpSGt1RnCKiYxAOFCW5P=VtmYmmtkGuw@mail.gmail.com> <20160717002508.591a61ce.freebsd@edvax.de> <CAO%2BPfDeLiavM%2BDQpvR0Sf=wG7NK6LByO7XddKED85WLNDAxCLA@mail.gmail.com> <2ab232fb-0476-a5be-a9ad-14b9c63adcef@hiwaay.net>
next in thread | previous in thread | raw e-mail | index | archive | help
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 <freebsd@edvax.de>: >>> 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.
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?899e0044-6016-4b47-aade-5d701766c0e0>