There are several things to try.
First, try: amixer set 'External Amplifier' off
If sound is still inaudible, revert your change (unmute it).
Next, try: amixer set 'Master Surround' 80%,on && amixer set 'Spread Front to
Surround and Center/LFE' on
If sound is still inaudible, revert the change to 'Spread Front to Surround and
Center/LFE' only.
Next, try: amixer set 'Exchange Front/Surround' on
** Changed in: linux-source-2.6.15 (Ubuntu)
Importance: Untriaged => Low
Status: Unconfirmed => Needs Info
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Sound Card on Haier H51 laptop is recognised, but not functional.
https://launchpad.net/bugs/52319
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