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    Recalbox x64 Laptop to TV black screen

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    recalbox x64 laptop
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    • Roxas84
      Roxas84 last edited by

      Hi everyone. I created a recalbox on an usb key to use it on my laptop, it's working like a charm.
      But when I try to connect it on my TV through HDMI I see the logo menu on both screens but then I have a black screen on the tv and my laptop screen still displaying recalbox as usual.

      Of course I made some research here.
      https://recalbox.gitbook.io/documentation/tutorials/video/display-configuration/configure-an-external-display-x86-x86_64

      It seems that's easier to do this since the 7.0 update.

      Anyway I don't have another computer, so to connect to the ssh thing I'm using my android phone using Mobile SSH app.

      Screenshot_20210111-221921_Mobile SSH.jpg

      Then I go on recalbox conf in share/system and I write this :

      Prefered external screen retrieved from ssh : xrandr

      ;system.externalscreen.prefered=HDM1

      Force selected external screen to resolution ex : 1920x1080

      ;system.externalscreen.forceresolution=1920x1080

      But nothing happens, the problem is still here, I have tried different resolution but nothing works.

      Can someone help me ?

      Zing 1 Reply Last reply Reply Quote 0
      • Zing
        Zing Global moderator Translator @Roxas84 last edited by

        @Roxas84 You need to remove the semicolon (;) from the beginning of the line, any line beginning with ; or # is not considered by the system.

        Se a minha resposta foi útil, por favor, dê um voto positivo, clicando na seta para cima logo abaixo da resposta, ao lado de "citar".
        If my answer was helpful, please give a positive feedback by clicking the up arrow below the answer, next to "quote".

        Roxas84 1 Reply Last reply Reply Quote 0
        • Roxas84
          Roxas84 @Zing last edited by Roxas84

          @Zing I just did thx but still nothing...I also corrected the HDM1 into HDMI1

          Zing 1 Reply Last reply Reply Quote 0
          • Zing
            Zing Global moderator Translator @Roxas84 last edited by Zing

            @Roxas84 I didn't realize it before, but the result of your xrandr says "HDMI1 disconnected", that is why it is not working.
            The Problem can be:

            • You didn't turn on your TV before testing the command
            • the HDMI cable has a problem
            • the cable is not connected correctly on one side (notebook or TV)
            • the HDMI connector has a problem

            Se a minha resposta foi útil, por favor, dê um voto positivo, clicando na seta para cima logo abaixo da resposta, ao lado de "citar".
            If my answer was helpful, please give a positive feedback by clicking the up arrow below the answer, next to "quote".

            Roxas84 1 Reply Last reply Reply Quote 0
            • Roxas84
              Roxas84 @Zing last edited by

              @Zing The HDMI conector and cable have no problems, it works with my PC and PS4 and other TVs, I even tried another cable.

              When I start recalbox I can see the splash screen on my TV then black screen. On the splash screen the TV show the source as HDMI1/DVI 1366x768 @60hz. I tried this resolution too with disabled/enabled forced 60hz, still nothing.

              I have tried all the name output I see on xandr. I change the X into x when I write the resolution and I also tried to force the 60hz.

              Still nothing.

              Zing 1 Reply Last reply Reply Quote 0
              • Zing
                Zing Global moderator Translator @Roxas84 last edited by

                @Roxas84 Does your notebook have an Nvidia video card?
                I can't be sure, but, researching about it, I only see users who use Nvidia graphics cards reporting "HDMI1 disconnected" problems (on Linux, I didn't find a similar report here on the forum, but Recalbox is based on Linux, comparison), see:

                • https://forums.developer.nvidia.com/t/hdmi-output-missing-in-xrandr-command-and-external-monitor-does-not-work/68011
                • https://forums.gentoo.org/viewtopic-t-1090914-start-0.html
                • https://unix.stackexchange.com/questions/81822/hdmi-not-detected-by-xrandr
                • https://forum.manjaro.org/t/xrandr-says-hdmi-is-disconnected-for-external-monitor/28445
                • https://www.linuxquestions.org/questions/slackware-14/xrandr-reports-hdmi1-being-disconnected-when-it's-connected-4175479547/

                I can't tell you that any of these solutions work in Recalbox, probably not, but you can try it if you want.

                I believe your problem is a type of driver incompatibility, and if that is the case, there is nothing you can do.

                But, I'm not a developer, I can't say much, the most I can help is up to this point, I don't have enough technical knowledge to help you further.

                Se a minha resposta foi útil, por favor, dê um voto positivo, clicando na seta para cima logo abaixo da resposta, ao lado de "citar".
                If my answer was helpful, please give a positive feedback by clicking the up arrow below the answer, next to "quote".

                1 Reply Last reply Reply Quote 0
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