High CPU temperature and high fans level

[Erich Dollansky]

Hi,

On Sun, 17 Jul 2016 07:36:09 +0800
Yubin Ruan <ablacktshirt at gmail.com> wrote:

> On 2016年07月17日 06:25, Polytropon wrote:
> > 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.
> >  
> 
> How to check whether the powerd configuration is right ?
> 
you need something like

powerd_enable="YES"
powerd_flags="-a hiadaptive -b hiadaptive" # set CPU frequency

in /etc/rc.conf

Check the manual for the possible flags. This are settings which do not
provide the best result on a typical desktop but are a good start. 

Erich