[ubuntu] Resolving sound settings issues for Dell Inspiron 640m

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http://ubuntuforums.org – I am having some issues with the sound settings in Ubuntu 12.10 on my Dell Inspiron 640m laptop. Sound works fine out of box, but if I select the item from the "Play sound through" list of the "Output" tab of the sound settings, my account's sound is broken until I remove the ~/.pulse directory. The item in question is "Digital Output (S/PDIF): Built-in Audio". I repeat, selecting this item breaks sound. I need this resolved so that I can't inadvertently break sound in the settings menu. Adding a valid element to the "Play sound through" list is prefe (Hardware)