Sound does not work out of the box with Gutsy.
Consulting http://ubuntuforums.org/showthread.php?t=577469 yields:
sudo apt-get install linux-backports-modules-generic
Reboot so all changes take effect; you should now have sound
Change amixer settings so the microphone plugging in to the side will work (I haven’t got internal to work yet).
> amixer set Capture 15 cap
> amixer set Mux,0 3 cap