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I have an EliteBook 2730p, Energy Star, Windows 7 Pro and I can't get the sound on it. It's a dual-boot (Ubuntu 12.04), and the sound card works perfectly fine on Windows.

EliteBook:~$ grep "Codec:" /proc/asound/card*/codec*
/proc/asound/card0/codec#0:Codec: Analog Devices AD1984A
/proc/asound/card0/codec#1:Codec: LSI ID 1040

What could be the problem?

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