Para dizer ao pulseaudio que os fones de ouvido estão sempre conectados. Edite:
/usr/share/pulseaudio/alsa-mixer/paths/analog-output-lineout.conf
ENCONTRAR:
[Jack Headphone]
state.plugged = no (--->Change no to yes)
state.unplugged = unknown
OR / AND:
[Jack Front Headphone]
state.plugged = no (--->Change no to yes)
state.unplugged = unknown
AND:
[Element Headphone]
switch = off (--->Change off to on)
volume = off
OR / AND:
[Element Headphone2]
switch = off (--->Change off to on)
volume = off
SALVAR ARQUIVO E reiniciar o pulseaudio:
$ pulseaudio -k
$ pulseaudio --start