Radxa Rock 5B+ - Fan not working

[AaronNGray]

I am using :-

[ Ubuntu 24.04 (Noble)](https://dl.armbian.com/rock-5b-plus/Noble_vendor_server)

from :-

[Radxa Rock 5B Plus - Armbian](https://www.armbian.com/rock-5b-plus/) 

Trying to turn fan on on Radxa Rock 5B+

 

selecting the device using armbian-config actually makes it disappear

 

Quote

> cat usr/local/bin/test_fan_run.sh
#!/bin/bash echo "Trun on Fan"
echo 0 > /sys/devices/platform/fd8b0010.pwm/pwm/pwmchip0/export
echo 10000 > /sys/devices/platform/fd8b0010.pwm/pwm/pwmchip0/pwm0/period
echo 5000 > /sys/devices/platform/fd8b0010.pwm/pwm/pwmchip0/pwm0/duty_cycle
echo normal > /sys/devices/platform/fd8b0010.pwm/pwm/pwmchip0/pwm0/polarity
echo 1 > /sys/devices/platform/fd8b0010.pwm/pwm/pwmchip0/pwm0/enable

 

I am getting `line 3: echo: write error:Device or resource busy`

Edited September 26 by AaronNGray

[e.j. Frölich]

I use the desktop version and have the same issue.

[Igor]

2 hours ago, e.j. Frölich said:

I use the desktop version

HW (features are determined by kernel used in the image) related issues are shared among all variants, desktop, cli, minimal, Debian or Ubuntu. 

[AaronNGray]

I have the default radxa image rock-5b-plus_bookworm_kde_b2 image with the fan working :-

https://github.com/radxa-build/rock-5b-plus/releases/download/rsdk-b2/rock-5b-plus_bookworm_kde_b2.output.img.xz

 

I/We need to try and find how this was built and the Linux DTD file the `uname -a` kernel reports as "Linux rock-5b-plus 6.1.84-1-rk2410" kernel.

 

rsetup :-

https://docs.radxa.com/en/rock5/rock5b/getting-started/interface-usage/fan

https://github.com/radxa-pkg/rsetup

 

 

 

 

Edited 15 hours ago by AaronNGray

[AaronNGray]

From the Circuit Schematic it looks like the Radxa Rock 5B+ RK3588 GPIO0-C0 is the fan I/O, GPIO pin 24, if thats correct.

 

I will verify I can access this on the Armbian distro.