Date: Wed, 20 Jul 2016 12:46:32 +0200 From: David Demelier <demelier.david@gmail.com> To: Ian Smith <smithi@nimnet.asn.au> Cc: Polytropon <freebsd@edvax.de>, freebsd-questions@freebsd.org Subject: Re: High CPU temperature and high fans level Message-ID: <578F5688.8010207@gmail.com> In-Reply-To: <20160718224548.T324@sola.nimnet.asn.au> References: <mailman.101.1468756802.10563.freebsd-questions@freebsd.org> <20160718224548.T324@sola.nimnet.asn.au>
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Le 18/07/2016 15:41, Ian Smith a écrit : > In freebsd-questions Digest, Vol 632, Issue 8, Message: 21 > On Sun, 17 Jul 2016 11:59:32 +0200 David Demelier <demelier.david@gmail.com> 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). > > We really need to see what speed the CPU is running at when idle. > > I think the fans running high - presumably from the sound and airflow? - > rules out the sort of sensor errors Arthur reported (ie below ambient :) > and I assume the box actually feels warmer .. 57C suggests a busy CPU or > two .. but then it is summer there; what background ambient temp. range? We have air-conditioning at work so ambient temperature is normal, somewhat between 24-28. > > > 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. :( > > Normally I'd suggest posting this to freebsd-mobile@ as it's not been > such an uncommon issue, especially with some makes/models, but you could > try showing these to see if anyone spots something strange: > > % sysctl hw.acpi > % sysctl debug.acpi > % sysctl dev.est # assuming intel? if not, maybe dev.hwpstate? > % sysctl dev.cpu # best while idle, maybe plus when busier > Thanks for your answer, here I posted the output of the sysctl variables you asked for: http://markand.fr/files/result.txt I've ran them on a FreeBSD memstick, I needed to install a Linux distro until I can find a solution because this drains my battery a lot. The average temperature was 50C, a bit less than the installed version on hard drive where I have seen higher values. This is interesting. I will double check if something else makes the CPU more busy. Regards, -- David Demelier
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