New HP dm4 - No audio on ubuntu 11.10 64bits

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http://askubuntu.com – I just got a new laptop, HP dm4, and I'm having problems getting the audio to work properly on it. aplay -l lists: play -l ** List of PLAYBACK Hardware Devices ** card 0: PCH [HDA Intel PCH], device 0: STAC92xx Analog [STAC92xx Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 card 0: PCH [HDA Intel PCH], device 3: HDMI 0 [HDMI 0] Subdevices: 1/1 Subdevice #0: subdevice #0 I tried to edit /etc/modprobe.d/alsa-base.conf and added: option snd-hda-intel model=ref this caused the audio to work, but it's muffled. I'm wondering if anybody knows what would be the correct options to get th (HowTos)