Yes, testing the latest code with real machines is highly appreciated. Try sound-unstable git tree, either master or test/hda-migrate branch. git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-unstable.git
Alternatively you can build the external alsa-driver modules from alsa-driver-unstable snapshot tarball, too
ftp://ftp.suse.com/pub/people/tiwai/snapshot/alsa-driver-unstable-snapshot.tar.gz
Note that only the behavior of model=auto has been changed in the tree above. The other model behaviors of AD codecs are unchanged at all.
Mixer crashes are gone. As I wrote I have no way to test the digital output.
I haven't found a way to test multi stream playback either. After choosing HP Independant enabled I can't hear nothing through the headphone.
Can you post the output of alsa-info.sh ?
speaker-test -c2 -t wav -D hw:0,2
and another application playback using hw:0,0
Do your computer chassis have the hda front audio pannel with Jack detection ?
You need to disable auto mute when testing the multi streaming playback