Originally Posted by twaller
Thanks. Changing the HDMI input on the TV to UHD color did the trick. All is good.
Ahh nice. You should leave that on for all content. What it does is allow your TV to accept a 10 or 12bit color signal. Strange that Amazon worked though I question if it was even sending HDR and not just sending 4k at 8bit, but anyway all is well. Another note, make sure you set the color space on your TV to auto or native. If it's set to custom you won't be able to take advantage of wide color gamut from HDR sources. Auto will switch between rec.709 and bt.2020 depending on the incoming signal. Native will render everything in the TV's bt.2020 color space which will cause most content mastered for rec.709 to appear over saturated.
I wonder if others are having similar troubles. Every manufacturer calls this HDMI setting something different. Sony calls it Enhanced mode, LG calls it HDMI deep color, Samsung calls it HDMI UHD color. When this is off, the HDMI input won't accept a 10bit color signal from the Roku(or any UHD HDR device like a UHD Blu-Ray player) when it sends HDR metadata. I have no idea why this is even a toggle and not simply enabled full time since it does not affect the incoming signal at all.
LG 65" B7A OLED, Samsung 55" JS9000, Sony 43" x800e, Denon AVR-X2200w 5.1.2, PS4 Pro, Nintendo Switch, Gaming PC(GTX 1080ti + 4.7Ghz 8700k), Sony UBP-x800, Philips BDP-7501, Oppo BDP-203, Nvidia Shield TV
2x Elac F5/Elac C5/2x AR PS2052/2x Pioneer SP-T22A-LR/Power Sound Audio 15v w/ Anti-Mode 8033S-II
Last edited by cmdrdredd; 10-12-2016 at 07:29 PM.