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OLED screen and HDMI output simultaniously?



  • Hi guys,
    I have recently finished my tiny Gameboy-Nano, based on Raspberry Pi Zero V1.3 and retropie 4.1 and it works just fine, BUT:
    From the moment I implemented the OLED-screen output, the HDMI-output went dead!
    I find it very unfortunate to not be able to connect to the big screens anymore when not on the move. I searched the net and people seem to find it difficult, if not impossible to have both options. On the other hand I see this

    where from timestamp 11' onwards you can clearly see the guy having both displays running the same time.
    Any ideas, how to do that?
    Regards, Uwe



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