Re: Heating issues with FreeBSD on laptop

On Tue, Sep 27, 2022 at 8:09 AM Ian Smith <smithi@nimnet.asn.au> wrote:

> 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
>
>
>


Many years ago I encountered such a case in DragonflyBSD :
Frequently messages were displayed about high temperatures with increased
fan revolutions .

Later , I installed Linux .
The high temperature messages with accompanying fan revolution increases
continued .
In the end , the CPU completely failed .

This means , a CPU during progressive failure may show such high
temperature increases .


With my best wishes .


Mehmet Erol Sanliturk