I have two rockpro64 boards.
One board runs Debian buster with a slightly extended ayufan 5.4.0-rc1 kernel where as the other runs a Armbian (Debian) buster with the current project supplied 5.4.0-rc1 kernel.
On the Debian on I have installed the nice ats solution (https://github.com/tuxd3v/ats#install)
On the Armbian one the fan is running all the time. I tried to install ats there as well but I failed.
Also I found that basically the /sys/devi