I'm current using the RPI 2b to output internet radio to the headphone jacks, which are then connected to an external amplifier and speakers. Occasionally I switch to HDMI. To get HDMI working on Raspberry Pi 2b. Simply edit /boot/config.txt to get HDMI working by uncomment this line:
hdmi_force_hotplug=1
However, this breaks headphone output. When attempting raspi-config option 7 (advanced) would not switch to headphone from HDMI for audio, so had to comment out above line.
Also, alsa mixer breaks audio controls in mopidy/iris, so need to be commented out in file: /etc/mopidy/mopidy.conf
#[audio]
#mixer = alsamixer
Mopidy still crashes on a regualar basis. There appears to be a deadlock with http-server (tornado). At the moment, I must restart the mopidy process on a regular basis using this command:
sudo systemctl restart mopidy
