Problems on HP nx8220 with Audio Playback (I Assume its pulseaudio)

To start new with pulseaudio:

pulseaudio --kill
rm -rf ~/.pulse ~/.pulse-cookie
pulseaudio --start

Then check access to the soundcard:

sudo lsof | grep /dev/snd

which returns:

pulseaudi 5173     philipp   20u      CHR     116,10       0t0       3632 /dev/snd/controlC0
pulseaudi 5173     philipp   26u      CHR     116,10       0t0       3632 /dev/snd/controlC0

So I killed pulseaudio using:

sudo kill 5173


I worked on this according to this post on ubuntuforums.