alsamixer

pactl list | grep 'Active Port.*output.*'

[Element Headphone]
switch = off
volume = off

[Element Headphone]
switch = off
volume = merge
override-map.1 = all
override-map.2 = all-left,all-right

[Element Speaker]
required-any = any
switch = mute
volume = merge
override-map.1 = all
override-map.2 = all-left,all-right

[Element Speaker]
required-any = any
switch = mute
volume = off

pulseaudio -k && pulseaudio --start