Comment 23 for bug 109882

Ok, this has GOT to be the patch that fixes it -
http://hg.alsa-project.org/alsa-kernel/rev/c9f96ebed522
and it's dependency seems to be
http://hg.alsa-project.org/alsa-kernel/rev/2c9a8e76669e

I'll try and build a kernel which incorporates the patches, and report back :-)