Just a quick note here that I am so happy to have found an issue which was plaguing me on DietPi for my Raspberry Pi 400: the bluetooth wasn’t working. No matter what I tried, it always seemed as though DietPi simply never saw that part of the hardware; it didn’t show up as a usable device at all.
It took me a while to find the answer; in the end someone else had already done the smart bits: Raspberry PI 400 Bluetooth problem - Raspberry Pi Forums.
I figure I’ll just lay out the quick fix here because I love this distro and I want to add this little bit of knowledge to its community:
Run cd /etc; ln -s /usr/lib/firmware in your terminal (you’ll need to have proper permissions) and then reboot. That’s it. The issue seems to be that later versions of Debian are looking for a path called “etc/firmware” when that doesn’t actually exist anymore. Aliasing it to “/usr/lib/firmware”, where the files it needs actually live now, does the trick.
I used bluetoothctl to verify; a good result should look like this:
