Forum Discussion

tdexter's avatar
tdexter
Binge Watcher
8 months ago
Solved

LG OLED G4 not supporting Dolby Vision 4K

My new LG OLD G4 (OLED55G4SUB) isn't being recognized as being compatible with Dolby Vision 4K on my new Roku Stick 4K and I'm sure it is. The Roku default has 1080p Dolby Vision and there's an un-recommended option for Dolby Vision 4K at 30fps.

The Roku page mentions a "Freesync" setting but I have no such option on the TV. My understanding is that any 30fps limitations were on TVs prior to 2018 and again this is brand new.

Any suggestions? Thanks in advance.

Tom

TV & Player Setup
  • tdexter's avatar
    tdexter
    7 months ago

    Ahhh OK. That makes sense.

    Somehow though this just continues to disappoint: Clearly Dolby Vision is working on the Roku. In fact my TV often detects it and displays the TV's "Dolby Vision" in the upper right as soon as I go to the main menu of the Roku.

    However it doesn't appears to be working in the Roku's Fandango at Home app. What sucks with that, is that they don't appear to have any free content that's in Dolby Vision for me to test with. That means that the only time I can test it is when I actually pay for a rental.

    The other night we rented "A Complete Unknown" which is supposed to be in Dolby Vision. When we watched it, Fandango at Home said it was "UHD" but the TV clearly did NOT detect it as such and didn't display it's "Dolby Vision" in the upper right at all. VERY disappointing.

    In fact, the TV didn't even display any HDR in the upper right. Maybe I'm mistaken but I was SURE that my TV would display one of those two if it was even in UHD. I'm not convinced it even was.

    Fandango at Home is really the only reason I bought the Roku. If anyone has any insight on Fandango at Home and Dolby Vision I'd love to hear it.

    Tom

10 Replies

    • StreamerUser's avatar
      StreamerUser
      Roku Guru
      8 months ago

      tdexter 

      1)  Make sure you direct connect the Roku to the TV (at least temporarily) and turn on "4K" in the G4's settings: Settings/General/External Devices/HDMI Settings/HDMI Deep Color = 4K (do this for all the G4's HDMI inputs)

      2)  Disable DV always on:  Settings/System/Advanced System Settings/Advanced Display Settings/Dolby Vision Always On = Off

      If the connection through an AV/SB is the limiting factor (after connecting directly to the TV) then you need to adjust the AVR/SB settings (usually enable "Enhanced" mode for HDMI passthrough).

      • tdexter's avatar
        tdexter
        Binge Watcher
        8 months ago

        THANK YOU!! As to the second setting you mentioned, my G4 has no Advanced Display Settings at all under System/Advanced System Settings. Not sure about that, but the HDMI Deep Color clearly did the trick!!

        Thanks a million times over! Was about to return this thing actually!

        EDIT: I suspect that the second setting you referred to, may be what my TV has under Settings/General/External Devices/HDMI Settings/Dolby Vision PC, which was already off in my case. Again, can't thank you enough for the HDMI Deep Color setting. Not sure I would have ever found that!

        Tom