Grateful thanks to Valentin Crone for the workaround. I ran alsamixer in the terminal, selected Analog Output by right-arrowing and then Multichannel by up-arrowing, and now my sound works. I doubt whether this would ever occur to the non-technical user! It deserves to be more widely known.
Grateful thanks to Valentin Crone for the workaround. I ran alsamixer in the terminal, selected Analog Output by right-arrowing and then Multichannel by up-arrowing, and now my sound works. I doubt whether this would ever occur to the non-technical user! It deserves to be more widely known.