High CPU temperature and high fans level
demelier.david at gmail.com
Wed Jul 20 10:46:37 UTC 2016
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 at gmail.com> wrote:
> > 2016-07-17 0:25 GMT+02:00 Polytropon <freebsd at 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:
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.
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