`--autofanctrl` turns off the fan

[l29ah]

Even when CPU temperature climbs to 90°C under heavy load.
--fansetrpm and --fansetduty work as expected.
0.4.3 here.

[l29ah]

# framework_tool --versions
Mainboard Hardware
  Type:           Laptop 13 (AMD Ryzen 7040Series)
  Revision:       MassProduction
UEFI BIOS
  Version:        03.09
  Release Date:   04/22/2025
EC Firmware
  Build version:  azalea_v3.4.113385-ec:c25dec,os:7b88e1,cmsis:4aa3ff 2025-04-14 01:55:38 marigold1@ip-172-26-3-226
  Current image:  RO
PD Controllers
  Right (01):       0.0.1C (MainFw)
  Left  (23):       0.0.1C (MainFw)
Touchpad
  Firmware Version: v0704

[JohnAZoidberg]

Even when CPU temperature climbs to 90°C under heavy load.

That's expected. CPU temperature won't make the fan turn on until it's higher than 103C.
Most likely the other temperature sensors will reach their threshold earlier and cause the fan to turn on.
90C is okay for this type of CPU to be at.

See temp_fan_off of amd-apu
https://github.com/FrameworkComputer/ec/blob/fwk-lotus-azalea-19573/zephyr/program/framework/azalea/overlay.dtsi

[JohnAZoidberg]

To clarify, we mainly use temperature sensors on the mainboard to know whether or not to turn the fan on. Because CPU temperature is very volatile - it can go up and down very quickly.
Only after a while it spreads to the rest of the Mainboard and system - then we turn on the fans to avoid the system getting too hot overall.

[JohnAZoidberg]

I checked that the command works as expected, manually setting Fan speed works and --autofanctrl returns it back to normal EC fan curve.