[ubuntu] conflicting sound card drivers maybe?? help please

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http://ubuntuforums.org – Hello I am a newbie to linux. This kid I work with has Ubuntu installed and his sound card drivers were working and then he did a system update and now his card isn't working..it works about 50/50 of the time. He dual boots with windows 7 and it works on windows seven. I feel like it is a conflicting driver somewhere is there a terminal command I can enter to see if it is trying to ue two drivers. I know I used a command when my wifi wasnt working and it showed that I had two drivers installed. I just can't remember what it was. Any information would be greatly appreciated Thank you! (Hardware)