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Lewis3316's avatar
Lewis3316
Newbie
6 years ago

Roku ultra flickering screen

Ever since the update my roku has video flickering on 4k video. Now before you say it is TV or cables I have brought my other one from the bedroom and used the same cable no problem. It is a premier. I have run 4k from streaming services on apps on TV, also run from streaming off my computer. The only unit that doesn't work is this roku. I have changed settings that were listed on several post. ( auto detection disable, hdmi version and have tried several different cables) nothing works. It worked fine before the update so I did a factory reset ( no good). Please help. 

app playback

20 Replies

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  • Ski6266's avatar
    Ski6266
    Newbie
    6 years ago

    Just getting set up and the streaming blinks constantly. Outside of Roku everyhing works great.

     

    How do I make it stop? Is it a bad box?

  • Poorjohnny's avatar
    Poorjohnny
    Channel Surfer
    6 years ago

    I’m having a similar issue. It’s mostly when I’m streaming a show with ads. Every time it’s about to go to the ad, it flickers and shows my TV’s info at the top like it does when the hdmi first connects when powered on. I have a Roku ultra on version 9.2.9.4807. I’ve tried all the settings mentioned and tried resetting the hdmi handshake. Nothing is helping. 

    Did you fix your issue? If so, what helped. 

    • RokuTannerD's avatar
      RokuTannerD
      Retired Moderator
      6 years ago

      Poorjohnny Thanks for the note here. A few thoughts related to this that should help resolve these types of issues: 

      - If you are using a 4K capable Roku device, you'll need to make sure you are using an HDCP 2.2 certified high-speed HDMI cable in order for video to play properly. Standard HDMI cables may not provide quick enough data transfer rates, and can cause video playback issues such as you described.

      - We'd also recommend trying a different HDMI port on your TV to see if your results vary. 

      - You might also make sure you've disabled 'Auto-adjust refresh rate' in Settings>System>Advanced system settings>Advanced display settings. 

       

      Thanks,

      Tanner

      • Samsung5User's avatar
        Samsung5User
        Reel Rookie
        6 years ago

        I had this issue with a Samsung Q8FN series TV. 'Auto adjust refresh rate' was already disabled. The only other parameter was changing HDR Subsampling from 4.2 to 4.2.2 and that seems to work. The issue seems somewhat temperature sensitive so I will have to see it it is still working after several hours but so far so good.

  • James77TX's avatar
    James77TX
    Newbie
    2 years ago

    I resolved a ghosting/flicker issue by changing "Dolby Vision" from always on to off. 

    Adjusting HDR subsample and auto refresh rate did not help. 

    Roku Ultra 4802X running 12.5.0 build 4178-C2 connected to an LG B7A 4K TV. Changing ports and cables did not help. 

    I believe the workload of converting all non Dolby Vision content (including home screen) is too much for the device and causes flickering and ghosting as well as audio drop outs. The TV would display frequent "Dolby Vision" indicators during use as the signal sync was reestablished. Playing the same content through native smart tv apps isolated the issue to the Roku, and changing ports and cables isolated it to a setting - forcing Dolby Vision for all content (default on OOB for my latest Roku).