Official PoE HAT Fan never turns on after upgrade to 5.10.y

[Mitchell]

If you are having issues with your POE hat after firmware upgrading, check out this thread: Official PoE HAT Fan never turns on after upgrade to 5.10.y · Issue #1532 · raspberrypi/firmware · GitHub

[Oliver]

Also see:

PoE HAT Fan Issues

Hey everyone, This is just a quick post to hopefully help resolve an issue that seems pretty relevant on the PoE HAT for the Raspberry Pi. Special thanks to one of our community members Michael for helping find the solution on this one! Since the most recent version of Raspbian has become available (2021-01-11), it appears that the fan on the PoE HAT ceases to work properly if you perform an update and upgrade from the Pi’s terminal which upgrades the kernel to 5.10.x and all firmware. This …