Armbian 25.8.1 Noble Gnome, Kernel: 6.1.115, Size: 1.4 GB, Release date: Aug 17, 2025, not switch on after boot.
Go into root
$ sudo -i
create radxa-fan-on.service
$ sudo nano /etc/systemd/system/radxa-fan-on.service
in the file, copy paste this inside radxa-fan-on.service
[Unit]
Description=Set Radxa ROCK fan to persistent ON
After=network.target
[Service]
ExecStart=/bin/sh -c "echo user_space > /sys/class/thermal/thermal_zone0/policy && echo 80 > /sys/devices/platform/pwm-fan/hwmon/hwmon7/pwm1"
[Install]
WantedBy=multi-user.target
press ctrl-x then y then enter to save and close radxa-fan-on.service file
Enable and start radxa-fan-on.service
$sudo systemctl enable radxa-fan-on.service
$sudo systemctl start radxa-fan-on.service
Restart ROCK 5C to see if the fan switch on automatically after boot.