Try running "echo 110 > /sys/class/hwmon/hwmon1/pwm1" then bump it back to 255 I have found that to work on a different rockchip based device
Dennis
On Tue, Dec 7, 2021, 05:30 Peter Robinson <pbrobinson@xxxxxxxxx> wrote:
> The fan on my Rockpro64 does not work with fedora 34 installed. The
> file /sys/class/hwmon/hwmon1/pwm1 has the value 255. All the solution I
> have found were for Debian/Ubuntu and require installing firmware.
All the pieces should be upstream, is the pwm-fan module loaded?
P
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