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    Black screen on HMDI output, content on remote browser

    Scheduled Pinned Locked Moved Unsolved Troubleshooting
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    • C Offline
      chris_d @sdetweil
      last edited by

      @sdetweil said in Black screen on HMDI output, content on remote browser:

      lsb_release -a

      Distributor ID: Raspbian
      Description: Raspbian GNU/Linux 10 (buster)
      Release: 10
      Codename: buster

      I am using ssh to remote into the pi
      The following thread seems similar, but does not offer a solution
      https://forum.magicmirror.builders/topic/17211/having-trouble-with-launch-perhaps-display-value?page=1

      S 1 Reply Last reply Reply Quote 0
      • S Offline
        sdetweil @chris_d
        last edited by

        @chris_d interesting. I ssh into my mirror systems all the time and never have trouble.

        do

        pm2 stop all
        cd ~/MagicMirror
        npm start >somefile.txt 2>&1
        

        wait til the black screen
        ctrl-c in the ssh terminal

        then nano somefile.txt, scroll down
        see if there are any errors reported…

        the package.json will set DISPLAY if not set

        Sam

        How to add modules

        learning how to use browser developers window for css changes

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        • C Offline
          chris_d @sdetweil
          last edited by

          @sdetweil said in Black screen on HMDI output, content on remote browser:

          pm2 stop all
          cd ~/MagicMirror
          npm start >somefile.txt 2>&1

          Errors are:
          [2883:0119/213451.321388:ERROR:viz_main_impl.cc(186)] Exiting GPU process due to errors during initialization
          [2916:0119/213451.509005:ERROR:gpu_memory_buffer_support_x11.cc(44)] dri3 extension not supported.

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          • S Offline
            sdetweil @chris_d
            last edited by

            @chris_d in from to the npm start line do

            export ELECTRON_DISABLE_GPU=1
            

            and rerun…

            Sam

            How to add modules

            learning how to use browser developers window for css changes

            C 1 Reply Last reply Reply Quote 0
            • C Offline
              chris_d @sdetweil
              last edited by

              @sdetweil said in Black screen on HMDI output, content on remote browser:

              export ELECTRON_DISABLE_GPU=1

              No error now, but still a black screen

              S 2 Replies Last reply Reply Quote 0
              • S Offline
                sdetweil @chris_d
                last edited by

                @chris_d on the black screen press ctrl-shift-i to open the developers window, then select the console tab and scroll up for any errors usually red text

                Sam

                How to add modules

                learning how to use browser developers window for css changes

                M 1 Reply Last reply Reply Quote 0
                • M Offline
                  MikeBishop @sdetweil
                  last edited by

                  @sdetweil

                  I’m having what appears to be the same problem – HDMI is black (but apparently happy from the log output), while browser access is fine. I can’t get the dev tools to come up in Electron; perhaps unsurprisingly, the browser dev tools don’t show any errors that weren’t there on my old instance.

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                  • S Offline
                    sdetweil @MikeBishop
                    last edited by

                    @MikeBishop are you also running on buster?

                    Sam

                    How to add modules

                    learning how to use browser developers window for css changes

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                    • S Offline
                      sdetweil @chris_d
                      last edited by sdetweil

                      @chris_d try npm start dev to open dev window on startup

                      also can u try the npm start on the pi desktop, not over ssh?

                      Sam

                      How to add modules

                      learning how to use browser developers window for css changes

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                      • M Offline
                        MikeBishop @sdetweil
                        last edited by MikeBishop

                        @sdetweil

                        Bullseye, looks like. Whatever’s in the newest RPi OS release, anyway.

                        For the moment, I’ve swapped back to the other SD card that’s working. System’s been a little flaky the last few days, figured I’d try a fresh install on a new card in case that’s starting to go; hit this issue on the new one. When I have a few minutes to pull the Pi from the mirror and bring it back to my desk, I’ll give npm start dev a try on the newer one.

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