Got my Raspberry Pi 3 only a couple of days ago and have it connected to a TV via HDMI.
Display was flawless on setup of Ubuntu Mate 16.04 but there was no audio at all.
After some internet searching, change setting to “hdmi_drive=2” in /boot/config.txt solved the audio problem but ruined the display to 640x480 (even in the boot phase before UMate is loaded).
Search some more, change setting “hdmi_group=1” and “hdmi_mode=4” in /boot/config.txt solved the display problem.
Now playing any mp4 x264 video from NAS or SDCard on VLC in fullscreen mode freezes the video display but the audio keeps playing just fine. Also 1080p videos don’t display video at all but play audio ok.
Desperate for some help.
Thank you in advance.