Spritemv's original description was remarkably like my experiences trying to get a 2019 Roku Ultra to work at 4K 60Hz HDR with my Yamaha 7810. The Roku got to the point of automatic display resolution determination, found full compatibility 4K 60Hz HDR, but then when approving that resolution it went blank and needed to be turned off to work.
Roku's chat supporter asked me to try plugging it directly into an appropriate HDMI port of the LG TV. That immediately found the same high resolution automatically and allowed the picture and, yes it worked with a 4K HDR signal from a stream source as confirmed by the TV. She said it was Yamaha's issue not Roku's. That's not quite what I found.
I searched through the Yamaha manual and learned that the "mon. chk" advanced setting was sometimes not compatible with source devices. By turning off mon.chk you can manually force a resolution. Now, my Sony Blu Ray player and my Nvidia Shield TV devices had no problem doing full 4K 60Hz HDR resolution with my TV but I set mon.chk to "skip" and 4K mode to "1" which assumes full resolution. Instantly, the Roku worked at full resolution. Something there is about how Roku uses the report of the AVR to find the correct full resolution allowed by the TV but then deals with the information messes up. I call that a Roku issue perhaps more than a Yamaha issue.
I have a Yamaha TSR 7850 and was having issues with my new Roku HD and my Visio 4K TV. Fortunately my search string found this thread. I’ll try changing my advanced settings to see if that corrects my problem? Roku needs to follow this thread and find a solution.
Thanks for this thread! I had this issue way too often that I even upgraded what was probably a properly working Sony receiver for a Yamaha and had no issues for about a year. Then my Roku Premier started having all kinds of issues so I swapped it with my older Roku 4. Thinking a brand new Ultra would be great and then I could get the apps that were not on the 4, I just bought one. 1 day in all kinds of issues as described on this thread.
Went into my settings on my Yamaha and moved 1 setting from Auto (I think it was HDCP?) to 1.4 and zero issues and all of a sudden my Yamaha is communicating with all my devices better.
I fought this issue for months after getting the LG CX OLED 55” TV and interfacing it with Roku 2019 Ultra and Yamaha RX-A3080 receiver. I got into the habit of hitting home on the roku box, waiting until the TV turned on and said “No signal detected,” then switching via “Scene” on the Yamaha remote to Scene #2, then Scene #4 then back to Scene #1 (Roku box). PITA for sure but much less so than disconnecting and reconnecting HDMI cables.
Turned out there was a simple fix: 1) The TV has Dolby Vision as well as Dolby Atmos sound. The 2019 Ultra Roku NEVER properly passed even DD+. Even Dolby Surround was rendered as PCM by the 2019 Roku Ultra. (Yamaha amps allow you to inspect audio and video signals to see what you are actually getting.) 2) I read that the 2020 Roku Ultra supported Dolby Vision and Dolby Atmos sound and my daughter with a newer HD TV had decided to get Disney Plus. The simple solution was to order 2020 Roku Ultra and ship my daughter the 2019 Roku Ultra.
Plugged the 2020 Roku Ultra into my 8K HDMI cables and linear (quiet) power supply, and voila!! EVERYTHING WORKED AS DESIGNED (almost).* The while time I fought this switching inputs issue it had been the 2019 Roku Ultra Box which was at fault. As some of you have found, Roku support will never tell you this, and many of you will never know (unless you switch to a DAC, Chromecast, Blu-Ray Player that you are getting defective sound rendered by the 2019 roku so called ULTRA.
i could write a book about HDCP 2.2, HDMI 1.4 cables with enough bandwidth to pass 4K signals - instead I offer 2 tidbits to save you time:
1. Order 8K cables from Zeskit! I have the 8K Ultra HD High Speed 48Gpbs HDMI Cable which even renders 4:4:4 color space!! HDMI cables labeled high-speed, or sold as 4K will probably not work for you as you move to the BS copy protect of HDCP and HDMI 1.4+.
2. The copy protect schemes used with 4K and 8K video are so squirrelly that switching the cable ends can sometimes fix audio and video issues. Makes no sense to me, but that’s a Roku lesson learned from the original Roku box.
NOW - can anyone tell me why the 2019 Roku Ultra I sent to my daughter has disabled her Yamaha AirPlay2 streaming which has worked for 4+ years flawlessly?? Roku 2019 Ultra - Roku should refund our money!!
Running a Yamaha RXV385 with audio issues from a Roku Premier Ultra. Tried everything under the sun, numerous cables, settings, searches, etc. Enough to where I said screw it. Plugged it directly into my 86" LG Android T.V. and it works like a champ immediately. I'm back in business. Saw a reply in this thread, thought i'd pass it along..... worked for me as well.
Having similar issue but confined to pioneer osd information. Your description is though and accurate.
Roku suggested it was my Sony vpl295 projector.
I don’t believe that’s the case. I’ll try the suggestion that involve the screensaver. If that doesn’t work I’ll try your workaround.