NUC fan speed

[Jeffrey Walton]

On Thu, Aug 1, 2024 at 4:03 PM Noah <noah-list at enabled.com> wrote:
>
> Ahoy List Peoples,
>
> Running Ubuntu 22.04.4 LTS
>
> I have a Wall Street Canyon NUC rev12.
>
> The NUC fan speed goes high for about 30 seconds every one to 30 minutes
> and just watching top, htop, and glances is not giving me enough
> information as to why this is happening.
>
> I am charting the environmental SNMP details in librenms and polled
> every 5 minutes.  The CPU temperature is in a reasonable range.
>
> What have other people done that works well to figure out root cause and
> mitigate these high spinning fan situations?

Based on my limited experience with the NUC's, I've found... be sure
to run the latest UEFI.

The two NUCs I own had issues with power settings in Linux, and the
issues were fixed with UEFI updates that included updates to the ACPI
tables. And it looks like fan speed is part of the ACPI tables.
Confer, <https://uefi.org/htmlspecs/ACPI_Spec_6_4_html/11_Thermal_Management/fan-device.html>.

Jeff