If this topic is in the wrong place, please move it to the right place.
My PC is old, it is LGA 775 mainboard. When installing Ubuntu MATE 22-04, it's don't have sound came out to my speakers. I have been trying many different profile for sound setting from Menu > Preferences > Sound in Hardware section and got no luck.
Then i run MATE terminal , type alsamixer and displayed like this:
look like Front is muted.
to unmute, use left/right arrow to select Front and then press M
But, this is anoyning because everytime Ubuntu start, Front became muted again and i must manually switch to unmute. To workarround this problem i create:
amixer -c 0 set Front unmute
make startup item from Menu > Preferences > Startup Applications then Add.
in Command section, write code above.
NOTE: different soundcard has different name for audio output, for example, maybe it has name Speaker or other name, so the command become:
amixer -c 0 set Speaker unmute