Our original Ultra had no problem (it is plugged into our Yamaha receiver and then into the tv) but our streaming stick + in the bedroom (plugged directly into the tv) would not get a picture with firmware 9.2.0 4750 unless I changed the aspect ratio and then changed it back again. Even after rebooting the stick it wouldn't get a picture.
Thankfully I saw an update last night yo 9.2.0 4806 and downloaded it to both our Ultra and the streaming stick +.
That solved the issue for the stick and the Ultra still works just fine as always.
4K HDR TV: Samsung UN60KS8000 4K HDR Receiver: Yamaha RX-V381 4K HDR blu ray: Samsung UBD-K8500 4K HDR streamer: Roku Ultra 4640 (2016 model) 4K HDR Gaming: Xbox One X 4K HDR DVR: Directv Genie HS17-500 w/ C61K mini client Cables: Amazon Basics 18Gbps HDMI
I am having this handshake issue. Denon X3700h, Roku 4800r, LG CXPUA, HDMI over ethernet. I was having no issues with the prior Roku Ultra model but the Roku Ultra 2020 will give me a "no input" on my TV but I can hear the sounds when I press buttons. It seems AVR transfers over but Roku does not handshake. If I unhook the CAT6 and hook back up, then all is well. This issue occurs when I turn the system on. Once handshake is complete from disrupting the HDMI/connection and reconnecting, all is well.