Electron Error: Cannot open display :0
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 > firstname.lastname@example.org 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! email@example.com start: `sh run-start.sh` npm ERR! Exit status 1 npm ERR! npm ERR! Failed at the firstname.lastname@example.org 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 email@example.com 3 info using firstname.lastname@example.org 4 verbose run-script [ 'prestart', 'start', 'poststart' ] 5 info lifecycle email@example.com~prestart: firstname.lastname@example.org 6 info lifecycle email@example.com~start: firstname.lastname@example.org 7 verbose lifecycle email@example.com~start: unsafe-perm in lifecycle true 8 verbose lifecycle firstname.lastname@example.org~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 email@example.com~start: CWD: /home/pi/MagicMirror 10 silly lifecycle firstname.lastname@example.org~start: Args: [ '-c', 'sh run-start.sh' ] 11 silly lifecycle email@example.com~start: Returned: code: 1 signal: null 12 info lifecycle firstname.lastname@example.org~start: Failed to exec start script 13 verbose stack Error: email@example.com start: `sh run-start.sh` 13 verbose stack Exit status 1 13 verbose stack at EventEmitter. (/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. (/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 firstname.lastname@example.org 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:
xhost +–> unable to open display “:0”
xhost local:root--> unable to open display “:0”
xhost +localhost--> unable to open display “:0”
Defaults env_keep=DISPLAYin /etc/sudoers
export XAUTHORITY=$HOME/.Xauthorityin /home/pi/.bashrc
Do you have any idea how to solve this?
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.
setup wifi, keyboard, CLI-boot
you ARE running the GUI desktop, right… NOT commandline.
I am now
@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:
> email@example.com 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!
@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…