electron:837): Gtk-WARNING **: cannot open display: 0:

[yohu12]

when run DISPLAY=0:0 npm start, i meet such error.

root@raspberrypi:~/MagicMirror # DISPLAY=0:0 npm start

> magicmirror@2.8.0 start /root/MagicMirror
> sh run-start.sh


(electron:837): Gtk-WARNING **: cannot open display: 0:0
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! magicmirror@2.8.0 start: `sh run-start.sh`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the magicmirror@2.8.0 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!     /root/.npm/_logs/2019-08-01T14_29_27_057Z-debug.log

I have update the raspi-config to start with command line and text boot.
But error still here.
Any one can help me???

[yohu12]

And I can run startx to show the desktop screen on the monitor. only npm start is not work.

[sdetweil]

@yohu12 do it in two steps

export DISPLAY=:0
npm start

[yohu12]

@sdetweil said in electron:837): Gtk-WARNING **: cannot open display: 0::

export DISPLAY=:0

It return same error

(electron:1493): Gtk-WARNING **: cannot open display: :0

[sdetweil]

@yohu12 this is the same as MagicMirror/installers/mm.sh

Are u doing this over vpn?

Also the operating system must have xwindows running…

[__willo__]

I saw this error because the raspi was set to Autologin as “pi” and I had created another user which could not take control of the display.

[Corben Dallas]

I saw this just yesterday (followed by a few other warnings). Solution was to follow pretty much this ancient but still working how-to for jessie:
jessie-lite-installation-guide
(especially points describing “Install Xserver, LXDE-gui and lightdm” and missing packages)