[wrxtasy]

2. I have 4k TV (Samsung HU7500) with HDMI 2.0 and AVR with HDMI 1.4. Shield>AVR>TV max resolution I have 4k 30hz and color space RGB 8 bit Rec 709, YCbCr 4:4:4 8 bit Rec 709 or YCbCr 4:2:2 12 bit Rec 709. Whatever resolution/color space I choose in Kodi or SPMC I can't have 4k GUI. If I connect Shield directly to TV I have 4k60 Hz resolution and 4k GUI in SPMC or Kodi, why I can't have it in 4k30hz?
Thanks

HDMI 1.4 is limited to 4K@30Hz Max (bandwidth limitation). The HDMI 1.4 AVR is what your Shield is HDMI Handshaking with and reading valid Display Modes from on Bootup.

The interesting test is going to be Netflix that needs HDCP 2.2 for 4K Streaming Output. Your 1.4 AVR will not have HDCP 2.2
Have a read here all about Mixed mode HDMI / HDCP connections with Netflix and Amazon Video in this Monoprice page:
https://www.monoprice.com/product?p_id=15242