Help - No sound at all

[Karl Vanwynsberghe]

No sound at all.. acer aspire 6920

Hey!
I have no sound in Intrepid Ibex on my new Acer Aspire 6920 laptop... Have 
checked the volume control and unmuted the PCM control... Have followed a 
couple of guides, but nothing works...

This is my status:
:~$ aplay -l
**** Lijst van PLAYBACK hardware-apparaten ****
kaart 0: Intel [HDA Intel], apparaat 0: ALC889 Analog [ALC889 Analog]
  Sub-apparaten: 0/1
  Sub-apparaat #0: subdevice #0

:~$ cat /proc/asound/devices
  2:        : timer
  3:        : sequencer
  4: [ 0- 4]: digital audio capture
  5: [ 0- 0]: digital audio playback
  6: [ 0- 0]: digital audio capture
  7: [ 0]   : control

What to do???