Hello, I saw an earlier thread where someone with a MacBook Pro 6.2 couldn't get S/PDIF working. I'm facing the same problem on my MacBook Pro 5.5. I know this used to work at some point because the LED from the digital out used to glow (but my last recollection of this is from ca. Jan 2010, so not too helpful).
I tried jiggling some controls in hda-analyzer, but I don't yet know enough about this to be sure what I was doing made any sense.
I've uploaded alsa-info [1] and codecgraph [2] outout, and would really appreciate help figuring out how I can go about debugging this problem.
[1] http://people.collabora.co.uk/~arun/alsa-info.txt [2] http://people.collabora.co.uk/~arun/cs4206-mbp55.svg
Cheers, Arun
p.s.: fwiw, I'm testing with a: aplay -v -D iec958:CARD=NVidia,DEV=0 SURROUNDTEST_011212.wav