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    A New Chapter for MagicMirror: The Community Takes the Lead
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    Electron Error: Cannot open display :0

    Scheduled Pinned Locked Moved Unsolved Troubleshooting
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    • rudibaraniR Offline
      rudibarani Project Sponsor
      last edited by rudibarani

      Dear all,
      I have tried to setup MM2 about 20 times by now and always run into exactly the same error:

      pi@MirrorPi:~ $ cd MagicMirror/
      pi@MirrorPi:~/MagicMirror $ DISPLAY=:0 npm start
      
      > magicmirror@2.5.0 start /home/pi/MagicMirror
      > sh run-start.sh
      
      (electron:24936): Gtk-WARNING **: cannot open display: :0
      npm ERR! code ELIFECYCLE
      npm ERR! errno 1
      npm ERR! magicmirror@2.5.0 start: `sh run-start.sh`
      npm ERR! Exit status 1
      npm ERR! 
      npm ERR! Failed at the magicmirror@2.5.0 start script.
      npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
      
      npm ERR! A complete log of this run can be found in:
      npm ERR!     /home/pi/.npm/_logs/2018-10-03T21_35_33_903Z-debug.log
      

      The Log-File states:

      info it worked if it ends with ok
      1 verbose cli [ '/usr/bin/node', '/usr/bin/npm', 'start' ]
      2 info using npm@6.4.1
      3 info using node@v10.11.0
      4 verbose run-script [ 'prestart', 'start', 'poststart' ]
      5 info lifecycle magicmirror@2.5.0~prestart: magicmirror@2.5.0
      6 info lifecycle magicmirror@2.5.0~start: magicmirror@2.5.0
      7 verbose lifecycle magicmirror@2.5.0~start: unsafe-perm in lifecycle true
      8 verbose lifecycle magicmirror@2.5.0~start: PATH: /usr/lib/node_modules/npm/node_modules/npm-lifecycle/node-gyp-bin:/home/pi/MagicMirror/node_modules/.bin:/usr/local/sb$
      9 verbose lifecycle magicmirror@2.5.0~start: CWD: /home/pi/MagicMirror
      10 silly lifecycle magicmirror@2.5.0~start: Args: [ '-c', 'sh run-start.sh' ]
      11 silly lifecycle magicmirror@2.5.0~start: Returned: code: 1  signal: null
      12 info lifecycle magicmirror@2.5.0~start: Failed to exec start script
      13 verbose stack Error: magicmirror@2.5.0 start: `sh run-start.sh`
      13 verbose stack Exit status 1
      13 verbose stack     at EventEmitter.<anonymous> (/usr/lib/node_modules/npm/node_modules/npm-lifecycle/index.js:301:16)
      13 verbose stack     at EventEmitter.emit (events.js:182:13)
      13 verbose stack     at ChildProcess.<anonymous> (/usr/lib/node_modules/npm/node_modules/npm-lifecycle/lib/spawn.js:55:14)
      13 verbose stack     at ChildProcess.emit (events.js:182:13)
      13 verbose stack     at maybeClose (internal/child_process.js:962:16)
      13 verbose stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:251:5)
      14 verbose pkgid magicmirror@2.5.0
      15 verbose cwd /home/pi/MagicMirror
      16 verbose Linux 4.14.70-v7+
      17 verbose argv "/usr/bin/node" "/usr/bin/npm" "start"
      18 verbose node v10.11.0
      19 verbose npm  v6.4.1
      20 error code ELIFECYCLE
      21 error errno 1
      

      My setup process is:

      • clean install of latest image of Raspian stretch
      • setup wifi, keyboard, CLI-boot
      • sudo apt-get update && sudo apt-get upgrade
      • set memory-split to 256
      • activate Fake KMS
      • install latest versions of NodeJS (via apt-get) and npm (via npm)
      • install MM2 via raspberry.sh script

      I do not get any error messages during setup.

      I also tried the manual setup several times with the same result and even tried different Pis, SD cards and Monitors. Setting up the system on-site or via SSH does not make a difference either.

      Searching the internet did not get me very far. What I tried without success:

      • export DISPLAY=":0.0"
      • export DISPLAY=":0"
      • xhost +–> unable to open display “:0”
      • xhost local:root --> unable to open display “:0”
      • xhost +localhost --> unable to open display “:0”
      • adding Defaults env_keep=DISPLAY in /etc/sudoers
      • adding export XAUTHORITY=$HOME/.Xauthority in /home/pi/.bashrc

      Do you have any idea how to solve this?

      1 Reply Last reply Reply Quote 0
      • B Offline
        bream
        last edited by bream

        I had the same error, and the problem turned out to be that on first boot I had decided to reconfigure the pi to boot to the console rather than the desktop. Consequently I didn’t have a x server running (doh!)
        You didn’t mention that as one of your setup steps, but I though it might be worth mentioning.

        rudibaraniR 1 Reply Last reply Reply Quote 1
        • S Offline
          sdetweil
          last edited by

          @rudibarani said in Electron Error: Cannot open display :0:

          setup wifi, keyboard, CLI-boot

          you ARE running the GUI desktop, right… NOT commandline.

          Sam

          How to add modules

          learning how to use browser developers window for css changes

          1 Reply Last reply Reply Quote 0
          • B Offline
            bream
            last edited by

            I am now :)

            1 Reply Last reply Reply Quote 0
            • rudibaraniR Offline
              rudibarani Project Sponsor @bream
              last edited by

              @bream @sdetweil Thank you very much for your reply! This could be the right path! I have initially configured the Pi on the GUI surface (Wifi, Keyboard) and then switched to CLI boot. I have done this with my previous installations of MagicMirror without problems, as electron started the x-server as needed. This does not seem to work anymore…

              How do I revert this? I have changed back from CLI-boot to Desktop GUI in raspi-config. If I ssh into the pi and start MagicMirror via DISPLAY=:0 npm start, the application claims to start without problems:

              > magicmirror@2.5.0 start /home/pi/MagicMirror
              > sh run-start.sh
              
              Starting MagicMirror: v2.5.0
              Loading config ...
              Loading module helpers ...
              No helper found for module: alert.
              Initializing new module helper ...
              Module helper loaded: updatenotification
              No helper found for module: clock.
              Initializing new module helper ...
              Module helper loaded: calendar
              No helper found for module: compliments.
              No helper found for module: currentweather.
              No helper found for module: weatherforecast.
              Initializing new module helper ...
              Module helper loaded: newsfeed
              All module helpers loaded.
              Starting server on port 8080 ... 
              Server started ...
              Connecting socket for: updatenotification
              Connecting socket for: calendar
              Starting node helper for: calendar
              Connecting socket for: newsfeed
              Starting module: newsfeed
              Sockets connected & modules started ...
              Launching application.
              

              Unfortunately, the display still just shows the GUI of the operation system.
              Could you please help me from here?

              Thank you very much!

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

                @rudibarani i only do npm start from my ssh session

                do u have a keyboard on the pi? if so, ctrl-alt-t will open a shell window… then u should be able to get to the previous command with up arrow…

                Sam

                How to add modules

                learning how to use browser developers window for css changes

                1 Reply Last reply Reply Quote 0
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