Output through HDMI

[wally27]

I can get hdmi output to TV from xubuntu, and Ubuntu, with no issues, but not Ubuntu Mate. This is a deal breaker for me, and i will have to move distros unless some one can help me resolve this issue with mate.

many thanks in advance for any help.
I am using Mate 21.04

[gordon]

This sure sounds a lot like an incident from about six months ago:

Sound changed from box to monitor

I recently upgraded from 18.04 to 20.04. On 18.04 my speakers were plugged into my box and functioned without any problems. On 20.04, I have to plug them into my monitor (same monitor as b4). The sound is weaker and after a while it starts to produce static. Sound settings just gives me one device and one "settings for the selected device". What do I have to do to get my 20.04 to recognise the jack on my box instead of the one on my monitor?

The solution that worked at the time was to uninstall Timidity. But that doesn't mean you should go willy-nilly uninstalling Timidity yet! First show us the output of the command cat /proc/asound/cards. Then show us the Sound Settings dialog, under at least the "Output" tab and preferably also the "Hardware" tab.