Linux Fan Running At Full Speed!

I must have had this problem 2 or 3 years

It started after a routine software update

And today I finally got around to investigating why.

Allsky: cooling my Raspberry Pi

The Pi 4 can get very hot.

When it does, it throttles the cpu.

So I've been working on a solution.

Linux Mint: my cpu fan is roaring!

This is a very recent problem.

 I'm pretty convinced it was caused by a recent software update.