[all variants] Acer Aspire 2930Z - No Sound

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http://ubuntuforums.org – I recently installed Xubuntu 9.04 on an Acer Aspire 2930Z. The only issue is that I can't get any sound working on the front ports (where the headphone, microphone and line-in ports are). This is an annoyance since I use my headphones all the time. How can I get this to work? NOTE: I have used both Ubuntu and Kubuntu on this and they don't work either with the front ports. (Hardware)