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When running 10.10 on my HP 8450p laptop, sound worked fine. I've followed the various instructions on the main Ubuntu site for DebuggingSoundProblems, but nothing yet.

The hardware buttons on the laptop trigger volume up/volume down, and even mute/unmute. Yet, the indicator light on the laptop alwayss remain orange (which indicates that the sound is muted).

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Can you link to the instructions you followed or describe your steps briefly? – djeikyb Aug 12 '11 at 3:16
Have you tried running alsamixer from a terminal session and seeing if any of the sliders there are muted? (MM instead of a number at the bottom of a control) – jozzas Aug 12 '11 at 5:37
@djeikyb I've added a link to the DebuggingSoundProblems page. – Valdis R Aug 12 '11 at 14:59
up vote 2 down vote accepted

Finally got it. Under the "Sound" application, on the "Hardware" tab, I had to select "Analog Stereo Output" for "Profile". It was defaulted to "Analog Stereo Duplex".

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I found a guy who has the same problem. Check his blog. Here Hope that help.

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That blog entry has to do with the wireless interface, not audio. – Valdis R Aug 12 '11 at 14:58

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