Comment 15 for bug 360137

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Bocah nDeso (sutoto) wrote :

Here is the solution for the bugs above, I tried it on mine, Ubuntu 9.04 it works.

   1. Type the following command into the Terminal. (Applications -> Accessories -> Terminal)
      gedit /etc/modprobe.d/alsa-base.conf
   2. Add these lines to the end of the file:
      # Keep snd-pcsp from being loaded as first soundcard
      options snd-pcsp index=-2
      alias snd-card-0 snd-hda-intel
      alias sound-slot-0 snd-hda-intel
      options snd-hda-intel model=dell-m4-1
      options snd-hda-intel enable_msi=1
   3. Navigate to System -> Preferences -> Sound and change everything to ALSA
      Ubuntu Sound Preferences
   4. Go back to your Terminal and type in this
      vim /etc/group
   5. Replace the following line: (or something very similar to it)
      audio:x:29:pulse
      with this
      audio:x:29:<your Ubuntu login name>,pulse
   6. Reboot and test your sound. :)

For more detail please check here: http://idavespot.com/laptop/ubuntu-904-no-sound-on-hp-compaq-cq40/