My first Pi 3B with Ubuntu Mate 16.04 played sound out of the audio jack with no issues that I can remember. I have a 3B+ also with Ubuntu Mate both 16.04 and 18.04 installs (different SD cards) and neither one of them will play sound. I have seen a lot of posts re. playing sound via HDMI but I am simply needing to use the audio port.
Sound preferences shows:
- Hardware tab
- - bcm2835 ALSA
- - choices of mono or stereo on 16.04, mono only on 18.04
- Output tab
- - Analog output
alsa-utils are installed and up to date
pulseaudio is also installed and up to date
Any suggestions? I can look at the 3B again but that is a bit problematic as it is my production gateway, route, firewall, dhcp and vpn sharing box.