[ubuntu] Dell XPS 17 headphones and mic problems

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http://ubuntuforums.org – Hi, I have Dell XPS 17 with Ubuntu 12.04 64bit installed. When I plug in the headphones, sound is coming from both headphones and internal speakers. This worked fine on 11.10 64bit, as well as Windows. Also I have a problem on the same notebook with internal microphone (which is not detected and not present in sound preferences). Again, this worked fine on 11.10 64bit and Windows. Does anyone have the solution for these issues? Thanks. (Hardware)