A talk I gave at Hackware v1.6 about issues relating to the UART and Bluetooth issues associated with the new Raspberry Pi 3.
The recorded video of this talk can be found here. https://engineers.sg/video/raspberry-pi-3-uart-bluetooth-issues--609
You can also consult my Github Gist on configuring UART and Bluetooth on Arch Linux. https://gist.github.com/yeokm1/d6c3ca927919c61257cd