Unfortunately no one can be told what fun_plug is - you have to see it for yourself.
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I initially had an issue with my installation of ALT-F where it would not display the fan speed on the web UI.
I would be getting this error: cat: can't open '/tmp/sys/fan1_input': No such file or directory expr: syntax error sh: bad number sh: bad number sh: bad number
I had to manually change the symlink like so: ln -sfn /sys/class/hwmon/hwmon0/device/fan1_input /tmp/sys for it to show the fan speed.
Now the problem that I am running into is that when I make a change to the fan mode, such as to turn it fully off or changing it to low, or changing the auto temp values, none the changes take place despite the settings being saved to sysctrl.
My fan is always running at 3000 rpm regardless.
Any clues on why this might be?