after some hours of searching I finally found a solution (see http://www.alsa-project.org/alsa-doc...odule=intel8x0
for more details...).
In order to use the optical out connector with the alsa intel8x0 driver, you have to create an /etc/asound.conf file containing:
## not always hw:0,2
## cat /proc/asound/devices
## and look for
## "18: [ 0- 2]: digital audio playback"
## eg when it says
## "16: [ 0- 0]: digital audio playback"
## you must use "hw:0,0"
Further on, you must tell every sound application you want to use that it shall use the new output.
first set the mode to "expert", otherwise you aren't able to change the audio settings!
This settings work for me:
With this settings I'm able to use the optical out connector with the alsa drivers!