Comment 1 for bug 1047600

This kind of problems is typically caused by ALSA itself.

I'm afraid we cannot backport ALSA version from 12.10 in elementary OS because every version has its flaws and will not work somebody's use cases, but the one shipped with 12.04 is at least tested by Ubuntu, while we cannot afford a representative regression testing. Besides, the 12.04 version will be supported for much longer than the one in 12.10 and we cannot potentially deprive kernel-related systems of security updates.

So I'm marking it "won't fix" for elementary OS, though you can request cherrypicking this particular fix to 12.04 version in the relevant Ubuntu package (https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+filebug).