What is not working? Are you not getting sound? Ubuntu should have provided you with it's own default drivers. First look in the device manager to see if it is detected. Check to see what the driver provider is. It should mention something about ALSA. If it does, try running this command:
If it didn't mention anything about ALSA or your sound card isn't detected, try looking at this.
http://ubuntuforums.org/showthread.php?t=205449
It should guide you through.
Code:
sudo /etc/init.d/alsa-utils reset
http://ubuntuforums.org/showthread.php?t=205449
It should guide you through.