There is an issue with Ubuntu Netbook Remix (UNR), with Mic recording on Eee PC 1000H. The problem is with the “pulsaudio”. I will not go in deep details, but the fix is quite simple. All you have to do is remove the pulseaudio. To do this, open your terminal and run the following command.
sudo apt-get remove pulseaudio
This shouold do the trick. Cheers and good luck.