Comment 2 for bug 1803795

Thanks for filing this bug in Ubuntu.

The error was kind of detected by the script:
...
cat: hwmon0/fan1_input: Invalid argument
    Fan hwmon0/fan1_input has not returned to speed, please investigate!

As the output says, it's not guaranteed to work with all motherboards: "Note that many motherboards do not have pwm circuitry installed, even if your sensor chip supports pwm."

My own server reports having pwm controls for the fans, but fancontrol can't control them, so it falls under the category of the disclaimer above.

I tried to reach upstream to see if there were bug reports there, but http://www.lm-sensors.org/ seems down.

For the time being, may I suggest you file a bug report at https://github.com/lm-sensors/lm-sensors/issues with your log, which contains the chipset you have? Maybe it can be supported in the future.