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I installed Lubuntu 12.10 on my old laptop (Sharp Mebius PC-MR80J), but sound does not work. Here are things I tried.

  • aplay -l does not output anything.
  • When I run alsamixer, I see only one bar that says "Beep".
  • I installed pavucontrol, pulseaudio, pulseaudio-utils and libgtk-3-0 and checked output devices, but I only see "Dummy ouput" and there is no hardware output devices.
  • cat /proc/asound/cards returns the following.

    0 [Intel          ]: HDA-Intel - HDA Intel
              HDA Intel at 0xfeb38000 irq 40
  • cat /proc/asound/devices outputs the following.

    1:        : sequencer
    2: [ 0- 1]: hardware dependent
    3: [ 0- 0]: hardware dependent
    4: [ 0]   : control
    33:        : timer

The laptop was running Windows XP before and sound (both input and outpu) was working. What can I do now?

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