After adding following lines to /etc/modprobe.d/alsa-base the problem has not occured since.
options snd-via82xx index=-2 options snd-via82cxxx_audio index=-2 -- Integrated audio occasionally gets index 0 https://launchpad.net/bugs/66210 -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
