Comment 12 for bug 94566

You don't have to recompile the whole kernel!

On alsa's bugzilla entry (https://bugtrack.alsa-project.org/alsa-bug/view.php?id=2581), my post (#0016835) gives all the commands to download, build and install everything needed to fix the bug (or you can follow the same intructions on https://wiki.ubuntu.com/LaptopTestingTeam/Lenovo3000N100_0768, section "Sound").

That takes less than 15 mins even for a newbie, reboot included :-)