Previously working s/pdif sound stopped working (analog OK)

Previously working s/pdif sound stopped working (analog OK) My S/PDIF digital output used to work fine - stereo, DD, DTS, etc. However after upgrading my Mythbuntu 9.10 64 bit install to use the Nvidia 190 driver, I lost my SPDIF audio. In trying to fix it I've tried dozens of things ranging from the typical to the far-fetched, but none of them have worked.
Asked by: Guest \| Views: 309

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Guest [Entry]

"I ignored the most basic, simplest rule of debugging: verify your basic assumptions. I assumed my A/V receiver couldn't be the problem because it was brand new, it was working fine before I upgraded the video driver (and it has nothing to do with the video driver), and I hadn't messed with any of its settings. So in all the hours I spent troubleshooting, I never verified that the receiver was still working with an optical input. Tonight I plugged the s/pdif from my Ubuntu system into the optical input for the CD, and it worked. My receiver had somehow scrambled the connection for the original optical input. I played with the receiver preferences (switching the input source to HDMI and then back to optical) and now it works again.

Live and learn (again)..."