Ubuntu / Apple :: MacBook2,1, Internal Microphone Does Not Show-up?

On my white MacBook2,1 , the Internal Audio Analog Stereo device does work, and, in the "Sound Preferences", it shows up on the Output Tab. The MacBook2,1 has an internal microphone. In the "Sound Preferences", however, no device shows up on the Input Tab where it tells to "Choose a device for sound input", neither can I check or uncheck the Mute checkbox, nor can I slide the volume control bar. In sum, the internal Mic does not yet work. I need the Microphone for Skype etc.

Sound was said to work out-of-the-box already in Karmic Koala, but it didn't. Somewhere, I was then recommended to update to Lucid Lynx, which I did. On the page [URL].. it is, again, promised that the Sound will work out-of-the-box. It still doesn't. What shall I do? Boot Mac OSX, or get the Mic working? Here is what I have done sofar:

[Code]...