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Barbaud Julien
Asked: 2019-01-03 19:45:52 +0800 CST

"Could not connect to any X display" with gnuplot (Ubuntu for windows)

  • 772

I have installed the Ubuntu extension for Windows, but I run into troubles when I want to use gnuplot... I am just trying to plot a simple data file, but I get the following error :

QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-julien_barbaud'

qt.qpa.screen: QXcbConnection: Could not connect to display 

Could not connect to any X display.

Could not connect to existing gnuplot_qt. Starting a new one.

QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to
'/tmp/runtime-julien_barbaud'

qt.qpa.screen: QXcbConnection: Could not connect to display 

Could not connect to any X display.

As you may guess, I am not veryfamiliar with this problem. Is there Something I should set up in my environment to fix this ?

EDIT: after the suggestion in comments, I tried to use set term postscript. The output is different, but still no plot...

plot output after set term postscript

And after trying set term png, the plot command gives me this:

enter image description here

environment-variables display qt gnuplot

2 Answers

  1. Best Answer

    I could solve my problem by downloading Xming on my Windows system, so that linux can access X11 The qt terminal works well in this condition.

    Thanks for the help !

    • 2

  2. Add 

    libmali-xlnx
libmali-xlnx-dev
packagegroup-petalinux-x11-dev

    in rootfs configure.
    Then execute

    killall Xorg

    (no need when running Xorg for the first time).
    Finally run

    export DISPLAY=:0.0
/usr/bin/Xorg -depth 16&

    and then run the qt project.

    • 0