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[ubuntu] Sound does not work after install

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linux-howto

http://ubuntuforums.org – When I run the Lucid Alpha 1 LiveCD from a USB stick, the sound almost works properly. I can hear through the speakers and record with the microphone. I decided to upgrade my Karmic installation in the hope that I would finally be able to use my microphone, but nothing I do makes it work. I have tried creating a new user account and delting the PulseAudio configuration, and installing Lucid freshly, but nothing has solved this problem. I am using an Acer Aspire 6530G with HDA hardware of some sort. (Hardware)