hiiiiiiiiii users need help

hiiiiiiiii i have three jacks to my motherboard line in ,line out, mic, my line in change is not working so i plugged my speakers to line out and i am able to change the setting with realtek manager when i am using xp but i dont know how to change the setting in ubuntu 10.4 as it is not showing realtek manager pllllllllllllzzzzzzzzzzz anyone show me the way to change line in to line out in ubuntu thank u

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