A fix is to modify /etc/modprobe.d/alsa-base and make the option line read:
options snd-via82xx dxs_support=5 This seems to fix everything on my MSI KT6-Delta with VIA chipset with VIA CMedia 5.1 sound -- Certain VIA-based chipsets erroneously enable DXS support https://launchpad.net/bugs/68659 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
