Acer ao722 external mic not working

I have recently installed openSUSE 12.1 with kde environment on Acer ao722. Everything works fine, except sound devices. I managed to enable internal mic, but I want to use my headset with Skype. Unfortunately system doesn’t recognize my external mic. Headphones work. I’ve been searching Google for solution and discovered that people experienced similar problem on ubuntu, but without solution.
Any help would be appreciated.