Asus EeePC 1025C
Everything works well on the EeePC 1025C out of the box, except for the built-in microphone. To fix it, press ctrl-alt-t to open a terminal and type the following command, followed by the enter key:
sudo sh -c "echo options snd-hda-intel model=laptop-dmic >>/etc/modprobe.d/alsa-base.conf"
Now reboot, and the built-in microphone will work.