Comment 31 for bug 25632

I found out that running IECSET in a terminal window will give you the status of your PCM data stream.
here is my results, pay close attention to the Data results...

Mode: consumer
Data: audio
Rate: 48000 Hz
Copyright: permitted
Emphasis: none
Category: PCM coder
Original: original
Clock: 1000 ppm

If after running IECSET yours says Data: Non Audio,
run iecset audio on to get all your PCM sources to play via SPDIF.

In my case, after playing a DVD the only audio available through SPDIF was DVD's. I figured out that since my amp no longer switched to PCM when playing music and other 2 channel sources that there was something changed in the digital data stream.

After running iecset audio on, all my 2 channel sources play through SPDIF again and the amp now switches to PCM when I do.

Hope this helps some of you... I'm running Intrepid Ibex.