@regeli
I just bought a Vertex2 (to use eArc) and I can get surround sound (5.1) for audio coming from the cable TV box originally but for the internal TV apps like Netflix or Prime I get no sound.
Do you know any magic tricks?

Cable TV box -> Vertex HDMI0
Vertex TX0 -> TV HDMI3 (earc)
Vertex Audio out to Meridian HD621 and MMHR to G61R.

Main: Marantz Cinema 50, Meridian 271, DSP7200.2, DSP5200HC, DSP5000 rears, Meridian 210.
PC/Headphones: Mytek Liberty II, Sansui CA-F1, Sansui B-2301, Sennheiser HD800, Kef R3