The only solution that worked for me was to run an additional digital audio cable out from my Verizon set-top box.
I do not know why the HDMI cable-only solution can no longer send a Dolby Surround signal. It worked fine for years -- until this recent upgrade from Verizon messed things up.
I haven't tried that. Forgive me, but I'm unsure of what you mean by backend menu. The Verizon Fios menu setting is on "surround" and yes, I have toggled it back and forth. Is there another menu that I don't know about? Because if so, that might be my issue.
Thank you so much for the response!
And yes, I'm always sure to check with a 5.1 source, movie channel, etc. The mix is coming through somewhat correctly, but the multi-channel decoding light is not lit on the receiver as it is with all the other higher quality sources (bluray, xbox360, macbook pro, etc.).
Okay... after turning off all components and main power conditioner, Pass-through seems to work now in that the display shows DOLBY DIGITAL 3/2.1 instead of just PCM-48Mhz, and there is definitely a radical jump in quality (very pleased) ... but the multi-channel audio decoding light on the receiver (SONY STR DA4400ES) is still not lit. Strange.
Also, sidenote... after a few channel changes (to stations that aren't 5.1) the audio stops and I have to go though the process again which defeats the purpose. This whole thing doesn't seem normal. Is anyone else having these issues?
Because I actually had some time to play with this today, I just ran an optical cable to the receiver and rerouted the HDMI video source to that input, but this is a total workaround. HDMI SHOULD work. I had the same thing a few years ago when I had AT&T UVerse... but they did a software update and it rectifed the problem allowing me to remove the workaround.
Verizon, PLEASE... get on this. Thanks!