Fan not working on Rock 5B+ on Armbian Kernel Linux rock-5b-plus 6.1.115-vendor-rk35xx

[AaronNGray]

@pymumu I built and installed Armbian Server repo - but while using stress --cpu 8 I reach over 62 degrees C but the fan is not starting.

I am running an updated "Server images with Armbian Linux v6.1" - Kernel: 6.1.115, Size: 1.4 GB, Release date: May 24, 2025

from :-
https://www.armbian.com/rock-5b-plus/

aaronngray@rock-5b-plus:~$ uname -a
Linux rock-5b-plus 6.1.115-vendor-rk35xx #1 SMP Mon Sep  1 17:12:42 UTC 2025 aarch64 aarch64 aarch64 GNU/Linux

I am unable to download the Radxa release as there is an issue with GitHub downloads on all my machines and OS'es.

I have run sudo fan-control and am getting the following :-

aaronngray@rock-5b-plus:~/GitHub/fan-control-rock5b$ fan-control
Failed to export GPIO, No such file or directory
Failed to export GPIO, Permission denied
Failed to export GPIO, No such file or directory
Failed to export GPIO, No such file or directory
Failed to export GPIO, No such file or directory
Failed to export GPIO, No such file or directory
Failed to init GPIO
Failed to set thermal policy, Permission denied
Failed to init thermal.
aaronngray@rock-5b-plus:~/GitHub/fan-control-rock5b$ sudo fan-control
Failed to export GPIO, No such file or directory
Failed to export GPIO, No such file or directory
Failed to export GPIO, No such file or directory
Failed to export GPIO, No such file or directory
Failed to export GPIO, No such file or directory
Failed to export GPIO, No such file or directory
Failed to init GPIO
temp-map:
  speed: 0, temp: 40, duty: 0, duration: 20
  speed: 1, temp: 44, duty: 140, duration: 25
  speed: 2, temp: 49, duty: 153, duration: 35
  speed: 3, temp: 54, duty: 178, duration: 45
  speed: 4, temp: 59, duty: 204, duration: 60
  speed: 5, temp: 64, duty: 229, duration: 120
  speed: 6, temp: 67, duty: 255, duration: 180
speed:1  temperatrue:47153
speed:1  temperatrue:47153
speed:1  temperatrue:46230
speed:1  temperatrue:47153
speed:1  temperatrue:47153
speed:1  temperatrue:47153
speed:1  temperatrue:47153
speed:1  temperatrue:47153
speed:1  temperatrue:46230
speed:1  temperatrue:46230
speed:1  temperatrue:46230
speed:1  temperatrue:46230
speed:1  temperatrue:46230
speed:1  temperatrue:46230
speed:1  temperatrue:46230
speed:1  temperatrue:46230
speed:1  temperatrue:46230
speed:1  temperatrue:46230
speed:1  temperatrue:46230
speed:1  temperatrue:46230
speed:1  temperatrue:46230
speed:1  temperatrue:46230
speed:1  temperatrue:46230
speed:1  temperatrue:46230
^C

[pymumu]

please follow the steps in the ReadMe.md

[AaronNGray]

@pymumu Sorry, I should have made it clear, I did so :-

git clone https://github.com/pymumu/fan-control-rock5.git
cd fan-control-rock5
make package
sudo dpkg -i fan-control*.deb

sudo systemctl enable fan-control
sudo systemctl start fan-control

[pymumu]

From the log, the fan has been set to work. Check whether the line connection is correct.

[AaronNGray]

The fan works on the Radxa Debian Bookworm KDE image, now that I can down load that.

From the Schematic I have found the fan I/O is on GPIO0-C0, gpio24 I think on the Rock 5B+.