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How can I enable sound on a Dell XPS 15 laptop running Ubuntu 10.04?

06 Jun 2011
06 Jun 2011 | |

I own a Dell XPS 15 laptop. I have Ubuntu 10.04 installed, but I am not able to hear sound. I have updated Linux, but still I am not able to hear the sound. How can I troubleshoot it? Please tell me. :)