I have a raspberry pi 2 running with Ubuntu Mate. When I try to play video or audio files with omxplayer, I do not get any sound on my TV which is connected to the Pi via HDMI.  If I force the Pi to play the audio on the audio jack it's working. I tried omxplayer -o hdmi video.mp4 but that still didn't workWhat do I need to do to get audio over my HDMI connection?
Raspberry pi hdmi audio not working
ubuntu;audio;raspberry pi;hdmi