Mic ::: = internal mic in your laptop???
Open KMix, configure the channels, and add every channel possible.... normally there are more possibilities to record sound on a laptop (internal, line in, mic in, ...)
Play with that settings (which one first - input sources / .....)
If you want to do that completely safely, try to make a new user-account, and do it there (maybe testing by trying to record sound in audacity)
(I've done the same this morning with my Medion-notebook (but in my own account), and now I can record sound in audacity with my internal micro (although the sound quality isn't good there, but that can be my fault)....)