Ubuntu Answers

In order to correct HDA Intel ICH8 sound card issues with the ALSA drivers you will need to open up gutsy-backports.

This is accomplished by:

System>Administration>Software Sources

Click on the Updates tab and check Unsupported-updates (gutsy-backports)

Click Close

Click Reload in the new window that opens (The information about available software is out-of-date)

Your computer will download the new updates and close the Software Sources window

Open up a terminal:

Applications>Accessories>Terminal

Enter this code in the terminal:

sudo apt-get install linux-backports-modules-generic

This installs the newest ALSA Drivers

Reboot and your sound should be restored