Comment 6 for bug 715877

The patch is here: http://mailman.alsa-project.org/pipermail/alsa-devel/2011-February/036840.html
If you don't want to compile it in yourself, either wait until Takashi's applied it (might take a few days, haven't seen him around this week) + wait one day + https://wiki.ubuntu.com/Audio/InstallingLinuxAlsaDriverModules
Or in a few weeks, it should be in Natty.