Re: Heating issues with FreeBSD on laptop

From: Ian Smith <smithi_at_nimnet.asn.au>
Date: Tue, 27 Sep 2022 05:08:30 UTC
On 27 September 2022 2:39:41 am AEST, Saniya Maheshwari <saniya.mah@gmail.com> wrote:
 > Hi,
 > 
 > I just installed FreeBSD on my laptop, and everything went smoothly, 
 > except one thing that my laptop seems to be a little warm and noisy 
 > (due to the fans) even when it's idle.

What make and model laptop?

What version of FreeBSD?

 > Following some steps on other forums, I tried the following:
 > 
 > $ sysctl 'hw.acpi.thermal'
 > 
 > This gives me an 'unknown oid' error.
 > 
 > $ sysctl -a | grep temp
 > 
 > This gives no results.

Please show results of

$ sysctl hw.acpi

If none, acpi.ko isn't loaded.

Otherwise select Verbose Booting from the startup menu, and scan results in /var/run/dmesg.boot to look for errors while booting.

You may need to put that file up on some site, and post a link to it here.

 > After running
 > 
 > # kldload coretemp
 > 
 > and retrying:
 > 
 > $ sysctl -a | grep temperature
 > 
 > I do get the CPU temperature values:
 > 
 > dev.cpu.15.temperature: 51.0C
 > dev.cpu.13.temperature: 50.0C
 > dev.cpu.11.temperature: 50.0C
 > ...
 > 
 > All this is when the laptop is absolutely idle with just the shell 
 > running in the TTY. I can confirm that
 > 
 > # top
 > 
 > shows the same (CPU 100% idle).
 > 
 > I'm not sure what is going wrong and would be grateful for any help.

How about:

$ sysctl -a | grep fan

cheers, Ian