Hi,I can't seem to figure out why I'm having this issue, so I thought maybe someone might have an answer for me... I have a Vizio M507-G1 (bought in 2020) that is Dolby Vision compatible and has a 60 frame refresh rate, so it *seems* as though it should be taking advantage of the best setting of my Roku Ultra. However, in the Display Type menu it says that my tv can "display 4K Dolby Vision HDR at 30 fps." The Roku is plugged directly into the tv using high speed HDMI 2.0 cables. I know that the Roku is automatically checking and that it must be an issue with the tv, but looking at the tv specs I can't figure out why. Or if there's a way to adjust it. Any help would be greatly appreciated! Thanks!Model 4802X - Roku UltraSerial X010006LLMM0Software 14.0Device ID SODA226LLMMO

Thanks for getting back to me. I had looked everywhere, but couldn't find anything about FreeSync for my model of tv. I looked online, in the manual, and dug through every menu on the tv and found nothing even similar. As I mentioned, I'm sure that this is an issue with the tv so I really do appreciate any insight anyone has. I'm just hoping to get the best picture possible. Thanks again!

Thanks again Emman. I did contact Vizio and they confirmed that all four ports on my model should support Dolby Vision at a 60f refresh rate. According to them, it's an issue with what the Roku is seeing. And there's no FreeSync setting for the tv either. Just to be sure, I just purchased a new high speed HDMI 2.0 cable, so that shouldn't be the issue. Is there any setting that I might be missing on the Roku? It's not as though I have poor picture quality, but would certainly like to take advantage of the Dolby Vision if I can. Thanks again,Mike

There's no setting you've missed on the Roku, but I still think there's something amiss with your TV settings. The key is it's statement it sees 4K/30 support. I can't speak to Vizio, but both my LG and Samsung 4K TVs require a setting on the HDMI port to passthrough the full 4K/60 that Dolby Vision requires. On my LG, it's labeled "HDMI Ultra HD Deep Color" and it's under the Picture settings. I forget exactly what Samsung calls theirs, but it's something similar. Each of these settings are specific to the HDMI port the device connects to, so you might need to enable it for multiple ports.

OK, just tested my Stick 4K+ on my Vizio V405 TV. The Stick reports the display as 4K/Dolby Vision capable. I used the Disney+ app for testing, as that's the only streaming source I have with DV content. I selected the original Iron Man movie to test, which D+ says provides DV. Once the movie loaded and began streaming, the Dolby Vision icon appeared on the screen. Pressing the info button on the TV remote confirmed it was a DV video being displayed. The Stick 4K+ (3821) has HDMI 2.0b, same as my Ultra 4800. So there's no question that Dolby Vision does NOT require HDMI 2.1. I will say that neither my Vizio nor my LG TV (the only two DV capable displays I have) indicate the refresh rate, so I can't say for certain if they are outputting 4K/30 or 4K/60. But that's immaterial since I am absolutely getting DV on both TVs.

Thanks Dan! That's good to know. I'll keep digging around...or give up as I'm not sure how much content has DV anyway. Much appreciated! Mike

Vizio M507-G1 can't display Dolby Vision with Roku Ultra

11 Replies

RokuEmmanuel-D
Community Moderator
9 months ago
Welcome aboard! Thanks for reaching out here in the Roku Community, rinso!

We completely understand that you're encountering this issue with your Roku Ultra not displaying Dolby Vision contents, and we would like to be able to help you sort this out.

For starters, if your TV supports Dolby Vision and you see the message below, you may need to adjust a setting on your TV called FreeSync.

FreeSync is designed to enhance your experience with a connected game console (e.g., Xbox, PlayStation), but with some TV models, FreeSync may disable Dolby Vision. To correct this behavior, you need to adjust the settings on your TV to disable FreeSync on the HDMI port where your Roku player is connected.

If you have an LG TV, you can refer to the sample instructions below, but the steps may vary from model to model and may change when the TV software is updated. When in doubt, refer to the user manual or online documentation for your specific make and model.

LG: Go to Home > HDMI > Settings > Advanced > Picture > Additional Settings > FreeSync > Off > Restart.

Check this out for more information: Why is 4K Dolby Vision not working on my Roku streaming player?

Please let us know if you need more help.

Thanks,
Emman
- rinso
  Channel Surfer
  9 months ago
  Thanks for getting back to me. I had looked everywhere, but couldn't find anything about FreeSync for my model of tv. I looked online, in the manual, and dug through every menu on the tv and found nothing even similar.
  
  As I mentioned, I'm sure that this is an issue with the tv so I really do appreciate any insight anyone has. I'm just hoping to get the best picture possible.
  
  Thanks again!
  - RokuEmmanuel-D
    Community Moderator
    9 months ago
    Thanks for keeping us in the loop, rinso.
    
    In this case, we suggest reaching out directly to Vizio TV support for any additional assistance. They can assist you in adjusting this setting on your TV.
    
    Hopefully, they will be able to help you sort this out and get you started streaming in no time.
    
    Please let us know if you need anything else so we can further assist you.
    
    Thanks,
    Emman

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Vizio M507-G1 can't display Dolby Vision with Roku Ultra

11 Replies

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