“Try this: Go to Settings -> System -> Advanced System Settings -> Advanced Display Settings -> Auto-adjust display refresh rate if it's set to Enabled, set it to Disabled, Then go to HDR subsampling and set it to 4:2:0 That worked for me, your results may vary.”
My biggest first mistake was not setting the input port to HDR enabled on the Vizio TV. Only HDMI ports 1 and 2 can do this. I tried them both so they are now both set for HDR.
I tried disabling the adv. setting and doing both 4:2:0 and 4:2:2. All with full power downs of both devices.
Roku also had me try setting the display to HDR 4k 60fps and after it failed the HDCP check you can "force" it to use theis 4k setting. Still didn't work.
Last test was to use my Roku Streaming Stick+. This kills the whole hdmi cable issue.
That doesn't work either.
My Vizio V585-G1 is going back to Costco. How can they sell something that is supposed to be 4k not even work with a 4k box. It's great if you only use the Smart TV functions but there is no Disney plus and my HDhomerunn isn't there.
I'll just go get a TCL 6 with built in Roku and add chromecast dongle.
I doubt that the problem is with the Vizio TV, and I've heard that the TVs with Roku built in are having problems with the 9.2.0 update also. Someone gave me a 4K Fire Stick for Christmas, and that has been working without any problems. I still go back to the Roku box from time to time simply because I like the user interface better.
So they are replacing the Roku Ultra for starters. I doubt that will help.
If Roku would just acknowledge that the problem was theirs it would be fine. I could wait for a firmware update. But they just want to blame the TV connection.
It is really funny when I use a Roku Streaming stick + and their is NO HDMI cable to blame. That HDMI cable cop out was a disaster. I bought a new one just to ward off the possibility. Sent it right back to Amazon.
I still don't understand how HDMI and HDCP can be a STANDARD if they can't follow it and make it work. It is really all about copyright protections. They want to make sure you can't take HDMI output and send it to something that will record a 4K signal. Talk about fighting the wrong battle. Who would do that? I can rip it from BluRay on my PC or just bit torrent it. Too much work for a protection that doesn't protect anything.
Just make my Roku box work on ANY 4k TV for crying out loud Roku!
Yes, it is all about copyright protection, and you can thank the MPAA and the RIAA for that, but I think that the 9.2.0 Roku software update was released a bit too soon, from the way it looks from my vantage point, they didn't test it enough before pushing it out, and I think they are going to pay a high price for that.
I'm not sure if you noticed, but this thread is marked "solved" if there is a solution to this problem, I can't find it here. Up until the release of the 9.2.0 software, I wouldn't have bought anything but a Roku. I simply got tired of having them push my box a different build of the software and then asking me if it worked any better. Apparently, not everyone is having this problem, it seems to be related to what hardware you have the Roku box connected to. At this point, the only suggestion I can offer is not to replace the Roku box, but to replace everything that it's connected to, the only problem is that I'm not 100% sure that will fix the issue.
@Frustr8dRkuUsr Thanks for sharing the observations here. I'm sorry to hear about the experience you're running into. I'll follow up directly to continue assisting you directly, and help pass your report and feedback along to our team to take a closer look at the behavior you are experiencing.