How to enable Bluetooth on Raspberry Pi 4 running Ubuntu 18.04
If you have installed Ubuntu 18.04 on your Raspberry Pi 4, you might notice that the Bluetooth hardware is disabled by default.
To enable Bluetooth, you need to read the instructions written in the
The solution is to edit
syscfg.txt and change
include nobtcfg.txt to
include btcfg.txt and reboot.
sudo dpkg -i pi-bluetooth_0.1.10ubuntu6_arm64.deb