Raspberry Pi 3 Bluetooth on Ubuntu Xenial
Ubuntu Xenial isn’t an officially supported operating system for the Raspberry Pi, but there are images available for both the Pi 2 and Pi 3 in Trusty and Xenial versions. I’ve found the Xenial image works quite well, but as I recently discovered the Bluetooth chip that is present on the Pi 3 isn’t detected at all out of the box. Getting it working turned out to be a bit of a mission.