Exactly as I'd feared, the working external sound stopped working after a simple re-start. And I have no idea what incantation made it work in the first place.
Was this after the computer had gone into resting mode ? ( screensaver running )
You should be able to STILL use paprefs ( PulseAudio Preferences ) and pavucontrol (PulseAudio Yolume Control ).
I recall on initial intsall that all the file permissions were messed up - I couldn't even start KDE properly. This makes me suspicious of Pardus itself. That should simply Not Happen and I wonder what else is amiss.
Did you add /home/user to the administrative wheel during installation?
I see we posted almost the same time, good luck Vakkotaur on your decision