Ubuntu POE Hat Fan

Ubuntu 20.04 Raspberry Pi PoE+ Hat Fan

By default the PoE+ Hat is only supported in Raspian. Ubuntu server may not start the fan correctly without configuration.

Running Ubuntu server may result in the fan not starting and temperatures becoming critical on the Raspberry Pi CPU.

Boot Firmware User Config

1. Edit /boot/firmware/usercfg.txt
   • Requires sudo privileges

2. Add the following parameter changes

    # Place "config.txt" changes (dtparam, dtoverlay, disable_overscan, etc.) in
    # this file. Please refer to the README file for a description of the various
    # configuration files on the boot partition.
   
    dtoverlay=pwm
    dtoverlay=gpio-fan
    dtoverlay=rpi-poe
    dtparam=poe_fan_temp0=40000,poe_fan_temp0_hyst=5000
    dtparam=poe_fan_temp1=50000,poe_fan_temp1_hyst=3000
    dtparam=poe_fan_temp2=60000,poe_fan_temp2_hyst=5000
    dtparam=poe_fan_temp3=70000,poe_fan_temp3_hyst=2000
   

3. Reboot

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