@Alex Murray: do you have any specific configuration lines defined in /etc/modprobe.d/* ? have you tried muting headphone channel while headphones are plugged in? you would have to unmute and mute a few more times in order to get back the sound..
@Alex Murray: do you have any specific configuration lines defined in /etc/modprobe.d/* ? have you tried muting headphone channel while headphones are plugged in? you would have to unmute and mute a few more times in order to get back the sound..