No sound output neither from speaker nor headphone

[zabadabadoo]

@Peterling

I notice a question mark in its wifi symbol down in the taskbar. But the wifi adapter still works.

Best to start a new thread for your wifi icon question mark issue. It has come up before, so see if this helps:

My wifi is connected but showing question mark always in the wifi icon

I get the same thing using Z15.3 Core. As wifi still works, I just ignore it. The "?" dissappears and comes back on occasions best known to itself. Maybe see this: 18.04 - Question mark icon instead of wifi icon - Ask Ubuntu I assume same for ubuntu 20.04. I may investigate "Connectivity Checking" setting mentioned in that link.