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Forum Update on Monday, May 27th 2025

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

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  • jsulmJ jsulm

    @lcleve What does

    echo $XDG_SESSION_TYPE
    

    output in a terminal?

    L Offline
    L Offline
    lcleve
    wrote on last edited by
    #6

    @jsulm The echo command yielded x11.

    I initially started with a conda environment and used conda to install pyqt5 following instructions on the conda website.

    Following your post, i installed from the $ prompt Qt6 following instructions from the Qt website.

    Is it possible that there is a problem with ubuntu 20.10? Is there an earlier version that is known to work?

    One again thank you for your help. As new comer to ubuntu and pyqt, this problem is quite daunting to me.

    lcleve

    jsulmJ 1 Reply Last reply
    0
    • L lcleve

      @jsulm The echo command yielded x11.

      I initially started with a conda environment and used conda to install pyqt5 following instructions on the conda website.

      Following your post, i installed from the $ prompt Qt6 following instructions from the Qt website.

      Is it possible that there is a problem with ubuntu 20.10? Is there an earlier version that is known to work?

      One again thank you for your help. As new comer to ubuntu and pyqt, this problem is quite daunting to me.

      lcleve

      jsulmJ Offline
      jsulmJ Offline
      jsulm
      Lifetime Qt Champion
      wrote on last edited by
      #7

      @lcleve Just to be sure: you do not start your app as root/sudo but normal user?

      https://forum.qt.io/topic/113070/qt-code-of-conduct

      L 1 Reply Last reply
      0
      • jsulmJ jsulm

        @lcleve Just to be sure: you do not start your app as root/sudo but normal user?

        L Offline
        L Offline
        lcleve
        wrote on last edited by
        #8

        @jsulm

        Thank you for your just-to-be-sure question, as I am a complete newcomer to Linux. Initially, I opened the program as a normal user. After your message, I looked up how to open as root. Using the following, I opened it up as root:
        sudo code --user-data-dir="~/.vscode-root". The program then opened up, but the gui was distorted, being too large for a 1920x1080 screen even though the size was set to 1920x1080 pixels. The text was also enlarged and out of expected boundaries. I also opened up the .ui file using the newly installed Qt5Designer on my Ubuntu system. It looked fine - identical to what was seen on Mojave OS. However, no change when the program was opened again from root.
        After opening as root, I got the following terminal output:
        root@jonathan-HP-Compaq-Elite-8300-USDT:/home/jonathan# source activate anno_env
        bash: activate: No such file or directory
        root@jonathan-HP-Compaq-Elite-8300-USDT:/home/jonathan# /usr/bin/env /home/jonathan/anaconda3/envs/anno_env/bin/python3.7 /root/.vscode/extensions/ms-python.python-2021.5.842923320/pythonFiles/lib/python/debugpy/launcher 33145 -- /home/jonathan/fullgui9JHC.gyp
        QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-root'

        With much appreciation for your help.

        lcleve

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        0
        • SGaistS Offline
          SGaistS Offline
          SGaist
          Lifetime Qt Champion
          wrote on last edited by
          #9

          Did you try to start your application directly from the command line outside of VSCode ?

          As for root it was just to make sure you did not do that as there are additional security restriction to avoid starting GUI application by default.

          Interested in AI ? www.idiap.ch
          Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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          0
          • L Offline
            L Offline
            lcleve
            wrote on last edited by
            #10

            Thanks for the clarification re root.

            After your message, I opened the program from the command line and got the same distorted gui.

            A popup message dialog seems to work. A file selection dialog also opens. Clicking and dragging the title bar doesn't work.

            Thanks for your help.

            lcleve

            1 Reply Last reply
            0
            • SGaistS Offline
              SGaistS Offline
              SGaist
              Lifetime Qt Champion
              wrote on last edited by
              #11

              What if you just create a minimal script showing a single QWidget ?

              What do you get ?

              Interested in AI ? www.idiap.ch
              Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

              L 1 Reply Last reply
              0
              • SGaistS SGaist

                What if you just create a minimal script showing a single QWidget ?

                What do you get ?

                L Offline
                L Offline
                lcleve
                wrote on last edited by
                #12

                @SGaist
                I used the same imports and the same conda env. Below is the code and terminal output:

                from PyQt5 import uic, QtGui, Qt, QtCore
                from PyQt5.QtGui import QKeySequence
                from PyQt5 import QtWidgets
                from PyQt5.QtCore import pyqtSlot
                from PyQt5.QtWidgets import QApplication, QWidget, QInputDialog, QLineEdit, QFileDialog, QMessageBox, QLabel
                import pandas as pd
                import time
                import numpy as np
                import os
                import os.path
                import getpass

                app = QApplication([])

                label = QLabel(' Hello World!')

                label.show()

                app.exe()

                Terminal Output:

                (base) jonathan@jonathan-HP-Compaq-Elite-8300-USDT:~$ source /home/jonathan/anaconda3/bin/activate
                (base) jonathan@jonathan-HP-Compaq-Elite-8300-USDT:~$ conda activate anno_env
                /usr/bin/env /home/jonathan/anaconda3/envs/anno_env/bin/python /home/jonathan/.vscode/extensions/ms-python.python-2021.5.842923320/pythonFiles/lib/python/debugpy/launcher 43883 -- /home/jonathan/PyQtTest.py
                (anno_env) jonathan@jonathan-HP-Compaq-Elite-8300-USDT:~$ /usr/bin/env /home/jonathan/anaconda3/envs/anno_env/bin/python /home/jonathan/.vscode/extensions/ms-python.python-2021.5.842923320/pythonFiles/lib/python/debugpy/launcher 43883 -- /home/jonathan/PyQtTest.py
                qt.qpa.screen: QXcbConnection: Could not connect to display
                Could not connect to any X display.
                (anno_env) jonathan@jonathan-HP-Compaq-Elite-8300-USDT:~$

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                0
                • SGaistS Offline
                  SGaistS Offline
                  SGaist
                  Lifetime Qt Champion
                  wrote on last edited by
                  #13

                  What is that debugpy ?

                  You seem to not have any environment variables set which is a bit surprising.

                  Interested in AI ? www.idiap.ch
                  Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                  L 1 Reply Last reply
                  0
                  • SGaistS SGaist

                    What is that debugpy ?

                    You seem to not have any environment variables set which is a bit surprising.

                    L Offline
                    L Offline
                    lcleve
                    wrote on last edited by
                    #14

                    @SGaist
                    I don't know what debugpy refers to. However, when I ran the program, I used the run-without-debug option in vscode.

                    I saw on the Qt website that Ubuntu 18.04 was supported, so I tested our program with this version and got the same error message: Could not connect to any X display. I also checked and found that x11 was being used.

                    Regarding environment variables, I do not recall having to set any when using MacOS Mojave where the program ran fine and I have seen no dialogs for this while setting up the Ubuntu 20.10 system. Any advice on how to explore this would be appreciated, since I do not have prior experience with this.

                    I have also checked permissions for the various files using the GUI options.

                    Once again, many thanks.

                    lcleve

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                    • SGaistS Offline
                      SGaistS Offline
                      SGaist
                      Lifetime Qt Champion
                      wrote on last edited by
                      #15

                      X11 is Linux only there's nothing here to compare with macOS.

                      How did you test that on 18.04 ?

                      One thing that I find really strange is that env seem to return empty which is something that is highly unexpected.

                      How are you starting your terminal ?
                      Which one do you use ?

                      Interested in AI ? www.idiap.ch
                      Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                      L 1 Reply Last reply
                      0
                      • SGaistS SGaist

                        X11 is Linux only there's nothing here to compare with macOS.

                        How did you test that on 18.04 ?

                        One thing that I find really strange is that env seem to return empty which is something that is highly unexpected.

                        How are you starting your terminal ?
                        Which one do you use ?

                        L Offline
                        L Offline
                        lcleve
                        wrote on last edited by
                        #16

                        @SGaist

                        I tested for x11 using: echo $XDG_SESSION_TYPE at the $prompt of the terminal. The terminal I used is the default terminal that installed with the operating systems (18.04 and 20.10), presumably gnome-terminal? Should I switch to another?

                        What is it that you see that indicates that "env seems to return empty"?

                        Could it be a matter of permissions, given that that a gui (albeit distorted ) did appear on the screen when I opened from root?

                        Thanks.

                        lcleve

                        1 Reply Last reply
                        0
                        • SGaistS Offline
                          SGaistS Offline
                          SGaist
                          Lifetime Qt Champion
                          wrote on last edited by
                          #17

                          I thought you called the env command and did not saw anything printed.

                          So it was not the case, can you call it and show what you get ?

                          Interested in AI ? www.idiap.ch
                          Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                          L 1 Reply Last reply
                          0
                          • SGaistS SGaist

                            I thought you called the env command and did not saw anything printed.

                            So it was not the case, can you call it and show what you get ?

                            L Offline
                            L Offline
                            lcleve
                            wrote on last edited by
                            #18

                            @SGaist
                            here is the result for 18.04. If this is not informative, I can send the result for 20.10, but it will take me a few minuttes to change hard drives.

                            (base) william@william-HP-Compaq-Elite-8300-USDT:~$ env
                            CLUTTER_IM_MODULE=xim
                            CONDA_SHLVL=1
                            LS_COLORS=rs=0:di=01;34:ln=01;36:mh=00:pi=40;33:so=01;35:do=01;35:bd=40;33;01:cd=40;33;01:or=40;31;01:mi=00:su=37;41:sg=30;43:ca=30;41:tw=30;42:ow=34;42:st=37;44:ex=01;32:.tar=01;31:.tgz=01;31:.arc=01;31:.arj=01;31:.taz=01;31:.lha=01;31:.lz4=01;31:.lzh=01;31:.lzma=01;31:.tlz=01;31:.txz=01;31:.tzo=01;31:.t7z=01;31:.zip=01;31:.z=01;31:.Z=01;31:.dz=01;31:.gz=01;31:.lrz=01;31:.lz=01;31:.lzo=01;31:.xz=01;31:.zst=01;31:.tzst=01;31:.bz2=01;31:.bz=01;31:.tbz=01;31:.tbz2=01;31:.tz=01;31:.deb=01;31:.rpm=01;31:.jar=01;31:.war=01;31:.ear=01;31:.sar=01;31:.rar=01;31:.alz=01;31:.ace=01;31:.zoo=01;31:.cpio=01;31:.7z=01;31:.rz=01;31:.cab=01;31:.wim=01;31:.swm=01;31:.dwm=01;31:.esd=01;31:.jpg=01;35:.jpeg=01;35:.mjpg=01;35:.mjpeg=01;35:.gif=01;35:.bmp=01;35:.pbm=01;35:.pgm=01;35:.ppm=01;35:.tga=01;35:.xbm=01;35:.xpm=01;35:.tif=01;35:.tiff=01;35:.png=01;35:.svg=01;35:.svgz=01;35:.mng=01;35:.pcx=01;35:.mov=01;35:.mpg=01;35:.mpeg=01;35:.m2v=01;35:.mkv=01;35:.webm=01;35:.ogm=01;35:.mp4=01;35:.m4v=01;35:.mp4v=01;35:.vob=01;35:.qt=01;35:.nuv=01;35:.wmv=01;35:.asf=01;35:.rm=01;35:.rmvb=01;35:.flc=01;35:.avi=01;35:.fli=01;35:.flv=01;35:.gl=01;35:.dl=01;35:.xcf=01;35:.xwd=01;35:.yuv=01;35:.cgm=01;35:.emf=01;35:.ogv=01;35:.ogx=01;35:.aac=00;36:.au=00;36:.flac=00;36:.m4a=00;36:.mid=00;36:.midi=00;36:.mka=00;36:.mp3=00;36:.mpc=00;36:.ogg=00;36:.ra=00;36:.wav=00;36:.oga=00;36:.opus=00;36:.spx=00;36:.xspf=00;36:
                            CONDA_EXE=/home/william/anaconda3/bin/conda
                            LESSCLOSE=/usr/bin/lesspipe %s %s
                            XDG_MENU_PREFIX=gnome-
                            LANG=en_US.UTF-8
                            DISPLAY=:0
                            GNOME_SHELL_SESSION_MODE=ubuntu
                            COLORTERM=truecolor
                            USERNAME=william
                            CONDA_PREFIX=/home/william/anaconda3
                            XDG_VTNR=2
                            SSH_AUTH_SOCK=/run/user/1000/keyring/ssh
                            MANDATORY_PATH=/usr/share/gconf/ubuntu.mandatory.path
                            S_COLORS=auto
                            _CE_M=
                            XDG_SESSION_ID=2
                            USER=william
                            DESKTOP_SESSION=ubuntu
                            QT4_IM_MODULE=xim
                            TEXTDOMAINDIR=/usr/share/locale/
                            GNOME_TERMINAL_SCREEN=/org/gnome/Terminal/screen/4415aacb_f29d_41fc_969b_1ecfb25dfbd2
                            DEFAULTS_PATH=/usr/share/gconf/ubuntu.default.path
                            PWD=/home/william
                            HOME=/home/william
                            CONDA_PYTHON_EXE=/home/william/anaconda3/bin/python
                            TEXTDOMAIN=im-config
                            SSH_AGENT_PID=2421
                            QT_ACCESSIBILITY=1
                            XDG_SESSION_TYPE=x11
                            XDG_DATA_DIRS=/usr/share/ubuntu:/home/william/.local/share/flatpak/exports/share/:/var/lib/flatpak/exports/share/:/usr/local/share/:/usr/share/:/var/lib/snapd/desktop
                            _CE_CONDA=
                            XDG_SESSION_DESKTOP=ubuntu
                            GJS_DEBUG_OUTPUT=stderr
                            CONDA_PROMPT_MODIFIER=(base)
                            GTK_MODULES=gail:atk-bridge
                            WINDOWPATH=2
                            TERM=xterm-256color
                            SHELL=/bin/bash
                            VTE_VERSION=5202
                            QT_IM_MODULE=ibus
                            XMODIFIERS=@im=ibus
                            IM_CONFIG_PHASE=2
                            XDG_CURRENT_DESKTOP=ubuntu:GNOME
                            GPG_AGENT_INFO=/run/user/1000/gnupg/S.gpg-agent:0:1
                            GNOME_TERMINAL_SERVICE=:1.84
                            XDG_SEAT=seat0
                            SHLVL=1
                            GDMSESSION=ubuntu
                            GNOME_DESKTOP_SESSION_ID=this-is-deprecated
                            LOGNAME=william
                            DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/1000/bus
                            XDG_RUNTIME_DIR=/run/user/1000
                            XAUTHORITY=/run/user/1000/gdm/Xauthority
                            XDG_CONFIG_DIRS=/etc/xdg/xdg-ubuntu:/etc/xdg
                            PATH=/home/william/anaconda3/bin:/home/william/anaconda3/condabin:/home/william/.local/bin:/home/william/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin
                            CONDA_DEFAULT_ENV=base
                            GJS_DEBUG_TOPICS=JS ERROR;JS LOG
                            SESSION_MANAGER=local/william-HP-Compaq-Elite-8300-USDT:@/tmp/.ICE-unix/2324,unix/william-HP-Compaq-Elite-8300-USDT:/tmp/.ICE-unix/2324
                            LESSOPEN=| /usr/bin/lesspipe %s
                            GTK_IM_MODULE=ibus
                            _=/usr/bin/env

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                            • SGaistS Offline
                              SGaistS Offline
                              SGaist
                              Lifetime Qt Champion
                              wrote on last edited by
                              #19

                              Everything looks Ok...

                              Next test: can you install and test your code with your distribution provided PyQt5 ?

                              Interested in AI ? www.idiap.ch
                              Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                              L 1 Reply Last reply
                              0
                              • SGaistS SGaist

                                Everything looks Ok...

                                Next test: can you install and test your code with your distribution provided PyQt5 ?

                                L Offline
                                L Offline
                                lcleve
                                wrote on last edited by
                                #20

                                @SGaist
                                The env results I sent before were for ubuntu 18.04. In retrospect, this may have complicated things unnecessarily, since our goal is is to work on ubuntu 20.10. So below is the env output for 20.10. Note that the username for 20.10 is jonathan. For the older version, it is william.

                                (base) jonathan@jonathan-HP-Compaq-Elite-8300-USDT:~$ env
                                SHELL=/bin/bash
                                SESSION_MANAGER=local/jonathan-HP-Compaq-Elite-8300-USDT:@/tmp/.ICE-unix/1707,unix/jonathan-HP-Compaq-Elite-8300-USDT:/tmp/.ICE-unix/1707
                                QT_ACCESSIBILITY=1
                                COLORTERM=truecolor
                                XDG_CONFIG_DIRS=/etc/xdg/xdg-ubuntu:/etc/xdg
                                XDG_MENU_PREFIX=gnome-
                                GNOME_DESKTOP_SESSION_ID=this-is-deprecated
                                CONDA_EXE=/home/jonathan/anaconda3/bin/conda
                                _CE_M=
                                GNOME_SHELL_SESSION_MODE=ubuntu
                                SSH_AUTH_SOCK=/run/user/1000/keyring/ssh
                                XMODIFIERS=@im=ibus
                                DESKTOP_SESSION=ubuntu
                                SSH_AGENT_PID=1663
                                GTK_MODULES=gail:atk-bridge
                                PWD=/home/jonathan
                                LOGNAME=jonathan
                                XDG_SESSION_DESKTOP=ubuntu
                                XDG_SESSION_TYPE=x11
                                CONDA_PREFIX=/home/jonathan/anaconda3
                                GPG_AGENT_INFO=/run/user/1000/gnupg/S.gpg-agent:0:1
                                XAUTHORITY=/run/user/1000/gdm/Xauthority
                                GJS_DEBUG_TOPICS=JS ERROR;JS LOG
                                WINDOWPATH=2
                                HOME=/home/jonathan
                                USERNAME=jonathan
                                IM_CONFIG_PHASE=1
                                LANG=en_US.UTF-8
                                LS_COLORS=rs=0:di=01;34:ln=01;36:mh=00:pi=40;33:so=01;35:do=01;35:bd=40;33;01:cd=40;33;01:or=40;31;01:mi=00:su=37;41:sg=30;43:ca=30;41:tw=30;42:ow=34;42:st=37;44:ex=01;32:.tar=01;31:.tgz=01;31:.arc=01;31:.arj=01;31:.taz=01;31:.lha=01;31:.lz4=01;31:.lzh=01;31:.lzma=01;31:.tlz=01;31:.txz=01;31:.tzo=01;31:.t7z=01;31:.zip=01;31:.z=01;31:.dz=01;31:.gz=01;31:.lrz=01;31:.lz=01;31:.lzo=01;31:.xz=01;31:.zst=01;31:.tzst=01;31:.bz2=01;31:.bz=01;31:.tbz=01;31:.tbz2=01;31:.tz=01;31:.deb=01;31:.rpm=01;31:.jar=01;31:.war=01;31:.ear=01;31:.sar=01;31:.rar=01;31:.alz=01;31:.ace=01;31:.zoo=01;31:.cpio=01;31:.7z=01;31:.rz=01;31:.cab=01;31:.wim=01;31:.swm=01;31:.dwm=01;31:.esd=01;31:.jpg=01;35:.jpeg=01;35:.mjpg=01;35:.mjpeg=01;35:.gif=01;35:.bmp=01;35:.pbm=01;35:.pgm=01;35:.ppm=01;35:.tga=01;35:.xbm=01;35:.xpm=01;35:.tif=01;35:.tiff=01;35:.png=01;35:.svg=01;35:.svgz=01;35:.mng=01;35:.pcx=01;35:.mov=01;35:.mpg=01;35:.mpeg=01;35:.m2v=01;35:.mkv=01;35:.webm=01;35:.webp=01;35:.ogm=01;35:.mp4=01;35:.m4v=01;35:.mp4v=01;35:.vob=01;35:.qt=01;35:.nuv=01;35:.wmv=01;35:.asf=01;35:.rm=01;35:.rmvb=01;35:.flc=01;35:.avi=01;35:.fli=01;35:.flv=01;35:.gl=01;35:.dl=01;35:.xcf=01;35:.xwd=01;35:.yuv=01;35:.cgm=01;35:.emf=01;35:.ogv=01;35:.ogx=01;35:.aac=00;36:.au=00;36:.flac=00;36:.m4a=00;36:.mid=00;36:.midi=00;36:.mka=00;36:.mp3=00;36:.mpc=00;36:.ogg=00;36:.ra=00;36:.wav=00;36:.oga=00;36:.opus=00;36:.spx=00;36:.xspf=00;36:
                                XDG_CURRENT_DESKTOP=ubuntu:GNOME
                                VTE_VERSION=6200
                                CONDA_PROMPT_MODIFIER=(base)
                                GNOME_TERMINAL_SCREEN=/org/gnome/Terminal/screen/f4b8c0e5_b44e_4a61_8b22_3f26ba220048
                                GJS_DEBUG_OUTPUT=stderr
                                LESSCLOSE=/usr/bin/lesspipe %s %s
                                XDG_SESSION_CLASS=user
                                TERM=xterm-256color
                                _CE_CONDA=
                                LESSOPEN=| /usr/bin/lesspipe %s
                                USER=jonathan
                                GNOME_TERMINAL_SERVICE=:1.81
                                CONDA_SHLVL=1
                                DISPLAY=:0
                                SHLVL=1
                                QT_IM_MODULE=ibus
                                CONDA_PYTHON_EXE=/home/jonathan/anaconda3/bin/python
                                XDG_RUNTIME_DIR=/run/user/1000
                                CONDA_DEFAULT_ENV=base
                                XDG_DATA_DIRS=/usr/share/ubuntu:/usr/local/share/:/usr/share/:/var/lib/snapd/desktop
                                PATH=/home/jonathan/anaconda3/bin:/home/jonathan/anaconda3/condabin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin
                                GDMSESSION=ubuntu
                                DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/1000/bus
                                _=/usr/bin/env

                                I am not entirely clear on what you mean for the next test. The program was previously transferred from Mojave to 20.10 via flash drive and run from vscode without debugging. After testing the code on Mojave to double check that it was working, I ran the code on 20.10 and got the following:

                                source /home/jonathan/anaconda3/bin/activate
                                (base) jonathan@jonathan-HP-Compaq-Elite-8300-USDT:~$ source /home/jonathan/anaconda3/bin/activate
                                conda activate anno_env
                                (base) jonathan@jonathan-HP-Compaq-Elite-8300-USDT:~$ conda activate anno_env
                                (anno_env) jonathan@jonathan-HP-Compaq-Elite-8300-USDT:~$ /usr/bin/env /home/jonathan/anaconda3/envs/anno_env/bin/python /home/jonathan/.vscode/extensions/ms-python.python-2021.5.842923320/pythonFiles/lib/python/debugpy/launcher 40389 -- /home/jonathan/fullgui9JHC.gyp
                                qt.qpa.screen: QXcbConnection: Could not connect to display
                                Could not connect to any X display.
                                (anno_env) jonathan@jonathan-HP-Compaq-Elite-8300-USDT:~$

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                                • SGaistS Offline
                                  SGaistS Offline
                                  SGaist
                                  Lifetime Qt Champion
                                  wrote on last edited by
                                  #21

                                  The idea is to use what is provided by Ubuntu rather than conda.

                                  But before doing that, can you start your application with the QT_DEBUG_PLUGINS environment variable set to 1 ?

                                  That will give you more information with what is happening with plugins.

                                  Interested in AI ? www.idiap.ch
                                  Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                                  • L Offline
                                    L Offline
                                    lcleve
                                    wrote on last edited by
                                    #22

                                    Based on what I found on web, I opened QtCreator: Tools-options-Environment-system-change. I added QT_DEBUG_PLUGINS=1, hit apply and ok. When I reopened the editor, the variable was there and set to 1. Re running the program as before yielded the same output in the vscode terminal. Should I look somewhere else ?

                                    JonBJ 1 Reply Last reply
                                    0
                                    • L lcleve

                                      Based on what I found on web, I opened QtCreator: Tools-options-Environment-system-change. I added QT_DEBUG_PLUGINS=1, hit apply and ok. When I reopened the editor, the variable was there and set to 1. Re running the program as before yielded the same output in the vscode terminal. Should I look somewhere else ?

                                      JonBJ Offline
                                      JonBJ Offline
                                      JonB
                                      wrote on last edited by JonB
                                      #23

                                      @lcleve
                                      With that variable set you're supposed to get a whole bunch of output on stdout/stderr. I don't know about "vscode terminal". If you know how to run your Python script from a terminal you can set the variable there before running it and you should see the output.

                                      1 Reply Last reply
                                      0
                                      • SGaistS SGaist

                                        The idea is to use what is provided by Ubuntu rather than conda.

                                        But before doing that, can you start your application with the QT_DEBUG_PLUGINS environment variable set to 1 ?

                                        That will give you more information with what is happening with plugins.

                                        L Offline
                                        L Offline
                                        lcleve
                                        wrote on last edited by
                                        #24

                                        @SGaist Below are the results. This time the gui opened, but with the same distortions.

                                        (base) jonathan@jonathan-HP-Compaq-Elite-8300-USDT:~$ conda activate anno_env
                                        (anno_env) jonathan@jonathan-HP-Compaq-Elite-8300-USDT:~$ export QT_DEBUG_PLUGINS=1
                                        (anno_env) jonathan@jonathan-HP-Compaq-Elite-8300-USDT:~$ env
                                        SHELL=/bin/bash
                                        SESSION_MANAGER=local/jonathan-HP-Compaq-Elite-8300-USDT:@/tmp/.ICE-unix/1707,unix/jonathan-HP-Compaq-Elite-8300-USDT:/tmp/.ICE-unix/1707
                                        QT_ACCESSIBILITY=1
                                        COLORTERM=truecolor
                                        XDG_CONFIG_DIRS=/etc/xdg/xdg-ubuntu:/etc/xdg
                                        XDG_MENU_PREFIX=gnome-
                                        GNOME_DESKTOP_SESSION_ID=this-is-deprecated
                                        CONDA_EXE=/home/jonathan/anaconda3/bin/conda
                                        _CE_M=
                                        GNOME_SHELL_SESSION_MODE=ubuntu
                                        SSH_AUTH_SOCK=/run/user/1000/keyring/ssh
                                        XMODIFIERS=@im=ibus
                                        DESKTOP_SESSION=ubuntu
                                        SSH_AGENT_PID=1663
                                        GTK_MODULES=gail:atk-bridge
                                        PWD=/home/jonathan
                                        LOGNAME=jonathan
                                        XDG_SESSION_DESKTOP=ubuntu
                                        XDG_SESSION_TYPE=x11
                                        CONDA_PREFIX=/home/jonathan/anaconda3/envs/anno_env
                                        GPG_AGENT_INFO=/run/user/1000/gnupg/S.gpg-agent:0:1
                                        XAUTHORITY=/run/user/1000/gdm/Xauthority
                                        GJS_DEBUG_TOPICS=JS ERROR;JS LOG
                                        WINDOWPATH=2
                                        HOME=/home/jonathan
                                        USERNAME=jonathan
                                        IM_CONFIG_PHASE=1
                                        LANG=en_US.UTF-8
                                        LS_COLORS=rs=0:di=01;34:ln=01;36:mh=00:pi=40;33:so=01;35:do=01;35:bd=40;33;01:cd=40;33;01:or=40;31;01:mi=00:su=37;41:sg=30;43:ca=30;41:tw=30;42:ow=34;42:st=37;44:ex=01;32:.tar=01;31:.tgz=01;31:.arc=01;31:.arj=01;31:.taz=01;31:.lha=01;31:.lz4=01;31:.lzh=01;31:.lzma=01;31:.tlz=01;31:.txz=01;31:.tzo=01;31:.t7z=01;31:.zip=01;31:.z=01;31:.dz=01;31:.gz=01;31:.lrz=01;31:.lz=01;31:.lzo=01;31:.xz=01;31:.zst=01;31:.tzst=01;31:.bz2=01;31:.bz=01;31:.tbz=01;31:.tbz2=01;31:.tz=01;31:.deb=01;31:.rpm=01;31:.jar=01;31:.war=01;31:.ear=01;31:.sar=01;31:.rar=01;31:.alz=01;31:.ace=01;31:.zoo=01;31:.cpio=01;31:.7z=01;31:.rz=01;31:.cab=01;31:.wim=01;31:.swm=01;31:.dwm=01;31:.esd=01;31:.jpg=01;35:.jpeg=01;35:.mjpg=01;35:.mjpeg=01;35:.gif=01;35:.bmp=01;35:.pbm=01;35:.pgm=01;35:.ppm=01;35:.tga=01;35:.xbm=01;35:.xpm=01;35:.tif=01;35:.tiff=01;35:.png=01;35:.svg=01;35:.svgz=01;35:.mng=01;35:.pcx=01;35:.mov=01;35:.mpg=01;35:.mpeg=01;35:.m2v=01;35:.mkv=01;35:.webm=01;35:.webp=01;35:.ogm=01;35:.mp4=01;35:.m4v=01;35:.mp4v=01;35:.vob=01;35:.qt=01;35:.nuv=01;35:.wmv=01;35:.asf=01;35:.rm=01;35:.rmvb=01;35:.flc=01;35:.avi=01;35:.fli=01;35:.flv=01;35:.gl=01;35:.dl=01;35:.xcf=01;35:.xwd=01;35:.yuv=01;35:.cgm=01;35:.emf=01;35:.ogv=01;35:.ogx=01;35:.aac=00;36:.au=00;36:.flac=00;36:.m4a=00;36:.mid=00;36:.midi=00;36:.mka=00;36:.mp3=00;36:.mpc=00;36:.ogg=00;36:.ra=00;36:.wav=00;36:.oga=00;36:.opus=00;36:.spx=00;36:.xspf=00;36:
                                        XDG_CURRENT_DESKTOP=ubuntu:GNOME
                                        VTE_VERSION=6200
                                        CONDA_PROMPT_MODIFIER=(anno_env)
                                        GNOME_TERMINAL_SCREEN=/org/gnome/Terminal/screen/c167ca7d_7f2e_486d_97ba_108c9f87d984
                                        GJS_DEBUG_OUTPUT=stderr
                                        LESSCLOSE=/usr/bin/lesspipe %s %s
                                        XDG_SESSION_CLASS=user
                                        TERM=xterm-256color
                                        _CE_CONDA=
                                        LESSOPEN=| /usr/bin/lesspipe %s
                                        USER=jonathan
                                        GNOME_TERMINAL_SERVICE=:1.81
                                        CONDA_SHLVL=2
                                        DISPLAY=:0
                                        SHLVL=1
                                        QT_IM_MODULE=ibus
                                        QT_DEBUG_PLUGINS=1
                                        CONDA_PYTHON_EXE=/home/jonathan/anaconda3/bin/python
                                        XDG_RUNTIME_DIR=/run/user/1000
                                        CONDA_DEFAULT_ENV=anno_env
                                        XDG_DATA_DIRS=/usr/share/ubuntu:/usr/local/share/:/usr/share/:/var/lib/snapd/desktop
                                        PATH=/home/jonathan/anaconda3/envs/anno_env/bin:/home/jonathan/anaconda3/bin:/home/jonathan/anaconda3/condabin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin
                                        GDMSESSION=ubuntu
                                        DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/1000/bus
                                        CONDA_PREFIX_1=/home/jonathan/anaconda3
                                        _=/usr/bin/env
                                        (anno_env) jonathan@jonathan-HP-Compaq-Elite-8300-USDT:~$ python3 /home/jonathan/fullgui9JHC.gyp
                                        QFactoryLoader::QFactoryLoader() checking directory path "/home/jonathan/anaconda3/envs/anno_env/plugins/platforms" ...
                                        QFactoryLoader::QFactoryLoader() looking at "/home/jonathan/anaconda3/envs/anno_env/plugins/platforms/libqeglfs.so"
                                        Found metadata in lib /home/jonathan/anaconda3/envs/anno_env/plugins/platforms/libqeglfs.so, metadata=
                                        {
                                        "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
                                        "MetaData": {
                                        "Keys": [
                                        "eglfs"
                                        ]
                                        },
                                        "className": "QEglFSIntegrationPlugin",
                                        "debug": false,
                                        "version": 329991
                                        }

                                        Got keys from plugin meta data ("eglfs")
                                        QFactoryLoader::QFactoryLoader() looking at "/home/jonathan/anaconda3/envs/anno_env/plugins/platforms/libqminimal.so"
                                        Found metadata in lib /home/jonathan/anaconda3/envs/anno_env/plugins/platforms/libqminimal.so, metadata=
                                        {
                                        "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
                                        "MetaData": {
                                        "Keys": [
                                        "minimal"
                                        ]
                                        },
                                        "className": "QMinimalIntegrationPlugin",
                                        "debug": false,
                                        "version": 329991
                                        }

                                        Got keys from plugin meta data ("minimal")
                                        QFactoryLoader::QFactoryLoader() looking at "/home/jonathan/anaconda3/envs/anno_env/plugins/platforms/libqminimalegl.so"
                                        Found metadata in lib /home/jonathan/anaconda3/envs/anno_env/plugins/platforms/libqminimalegl.so, metadata=
                                        {
                                        "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
                                        "MetaData": {
                                        "Keys": [
                                        "minimalegl"
                                        ]
                                        },
                                        "className": "QMinimalEglIntegrationPlugin",
                                        "debug": false,
                                        "version": 329991
                                        }

                                        Got keys from plugin meta data ("minimalegl")
                                        QFactoryLoader::QFactoryLoader() looking at "/home/jonathan/anaconda3/envs/anno_env/plugins/platforms/libqoffscreen.so"
                                        Found metadata in lib /home/jonathan/anaconda3/envs/anno_env/plugins/platforms/libqoffscreen.so, metadata=
                                        {
                                        "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
                                        "MetaData": {
                                        "Keys": [
                                        "offscreen"
                                        ]
                                        },
                                        "className": "QOffscreenIntegrationPlugin",
                                        "debug": false,
                                        "version": 329991
                                        }

                                        Got keys from plugin meta data ("offscreen")
                                        QFactoryLoader::QFactoryLoader() looking at "/home/jonathan/anaconda3/envs/anno_env/plugins/platforms/libqvnc.so"
                                        Found metadata in lib /home/jonathan/anaconda3/envs/anno_env/plugins/platforms/libqvnc.so, metadata=
                                        {
                                        "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
                                        "MetaData": {
                                        "Keys": [
                                        "vnc"
                                        ]
                                        },
                                        "className": "QVncIntegrationPlugin",
                                        "debug": false,
                                        "version": 329991
                                        }

                                        Got keys from plugin meta data ("vnc")
                                        QFactoryLoader::QFactoryLoader() looking at "/home/jonathan/anaconda3/envs/anno_env/plugins/platforms/libqxcb.so"
                                        Found metadata in lib /home/jonathan/anaconda3/envs/anno_env/plugins/platforms/libqxcb.so, metadata=
                                        {
                                        "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
                                        "MetaData": {
                                        "Keys": [
                                        "xcb"
                                        ]
                                        },
                                        "className": "QXcbIntegrationPlugin",
                                        "debug": false,
                                        "version": 329991
                                        }

                                        Got keys from plugin meta data ("xcb")
                                        QFactoryLoader::QFactoryLoader() checking directory path "/home/jonathan/anaconda3/envs/anno_env/bin/platforms" ...
                                        loaded library "/home/jonathan/anaconda3/envs/anno_env/plugins/platforms/libqxcb.so"
                                        loaded library "Xcursor"
                                        QFactoryLoader::QFactoryLoader() checking directory path "/home/jonathan/anaconda3/envs/anno_env/plugins/xcbglintegrations" ...
                                        QFactoryLoader::QFactoryLoader() looking at "/home/jonathan/anaconda3/envs/anno_env/plugins/xcbglintegrations/libqxcb-egl-integration.so"
                                        Found metadata in lib /home/jonathan/anaconda3/envs/anno_env/plugins/xcbglintegrations/libqxcb-egl-integration.so, metadata=
                                        {
                                        "IID": "org.qt-project.Qt.QPA.Xcb.QXcbGlIntegrationFactoryInterface.5.5",
                                        "MetaData": {
                                        "Keys": [
                                        "xcb_egl"
                                        ]
                                        },
                                        "className": "QXcbEglIntegrationPlugin",
                                        "debug": false,
                                        "version": 329991
                                        }

                                        Got keys from plugin meta data ("xcb_egl")
                                        QFactoryLoader::QFactoryLoader() looking at "/home/jonathan/anaconda3/envs/anno_env/plugins/xcbglintegrations/libqxcb-glx-integration.so"
                                        Found metadata in lib /home/jonathan/anaconda3/envs/anno_env/plugins/xcbglintegrations/libqxcb-glx-integration.so, metadata=
                                        {
                                        "IID": "org.qt-project.Qt.QPA.Xcb.QXcbGlIntegrationFactoryInterface.5.5",
                                        "MetaData": {
                                        "Keys": [
                                        "xcb_glx"
                                        ]
                                        },
                                        "className": "QXcbGlxIntegrationPlugin",
                                        "debug": false,
                                        "version": 329991
                                        }

                                        Got keys from plugin meta data ("xcb_glx")
                                        QFactoryLoader::QFactoryLoader() checking directory path "/home/jonathan/anaconda3/envs/anno_env/bin/xcbglintegrations" ...
                                        loaded library "/home/jonathan/anaconda3/envs/anno_env/plugins/xcbglintegrations/libqxcb-glx-integration.so"
                                        QFactoryLoader::QFactoryLoader() checking directory path "/home/jonathan/anaconda3/envs/anno_env/plugins/platformthemes" ...
                                        QFactoryLoader::QFactoryLoader() checking directory path "/home/jonathan/anaconda3/envs/anno_env/bin/platformthemes" ...
                                        QFactoryLoader::QFactoryLoader() checking directory path "/home/jonathan/anaconda3/envs/anno_env/plugins/platforminputcontexts" ...
                                        QFactoryLoader::QFactoryLoader() looking at "/home/jonathan/anaconda3/envs/anno_env/plugins/platforminputcontexts/libcomposeplatforminputcontextplugin.so"
                                        Found metadata in lib /home/jonathan/anaconda3/envs/anno_env/plugins/platforminputcontexts/libcomposeplatforminputcontextplugin.so, metadata=
                                        {
                                        "IID": "org.qt-project.Qt.QPlatformInputContextFactoryInterface.5.1",
                                        "MetaData": {
                                        "Keys": [
                                        "compose",
                                        "xim"
                                        ]
                                        },
                                        "className": "QComposePlatformInputContextPlugin",
                                        "debug": false,
                                        "version": 329991
                                        }

                                        Got keys from plugin meta data ("compose", "xim")
                                        QFactoryLoader::QFactoryLoader() looking at "/home/jonathan/anaconda3/envs/anno_env/plugins/platforminputcontexts/libibusplatforminputcontextplugin.so"
                                        Found metadata in lib /home/jonathan/anaconda3/envs/anno_env/plugins/platforminputcontexts/libibusplatforminputcontextplugin.so, metadata=
                                        {
                                        "IID": "org.qt-project.Qt.QPlatformInputContextFactoryInterface.5.1",
                                        "MetaData": {
                                        "Keys": [
                                        "ibus"
                                        ]
                                        },
                                        "className": "QIbusPlatformInputContextPlugin",
                                        "debug": false,
                                        "version": 329991
                                        }

                                        Got keys from plugin meta data ("ibus")
                                        QFactoryLoader::QFactoryLoader() looking at "/home/jonathan/anaconda3/envs/anno_env/plugins/platforminputcontexts/libqtvirtualkeyboardplugin.so"
                                        Found metadata in lib /home/jonathan/anaconda3/envs/anno_env/plugins/platforminputcontexts/libqtvirtualkeyboardplugin.so, metadata=
                                        {
                                        "IID": "org.qt-project.Qt.QPlatformInputContextFactoryInterface.5.1",
                                        "MetaData": {
                                        "Keys": [
                                        "qtvirtualkeyboard"
                                        ]
                                        },
                                        "className": "QVirtualKeyboardPlugin",
                                        "debug": false,
                                        "version": 329991
                                        }

                                        Got keys from plugin meta data ("qtvirtualkeyboard")
                                        QFactoryLoader::QFactoryLoader() checking directory path "/home/jonathan/anaconda3/envs/anno_env/bin/platforminputcontexts" ...
                                        loaded library "/home/jonathan/anaconda3/envs/anno_env/plugins/platforminputcontexts/libibusplatforminputcontextplugin.so"
                                        QFactoryLoader::QFactoryLoader() checking directory path "/home/jonathan/anaconda3/envs/anno_env/plugins/styles" ...
                                        QFactoryLoader::QFactoryLoader() checking directory path "/home/jonathan/anaconda3/envs/anno_env/bin/styles" ...
                                        QFactoryLoader::QFactoryLoader() checking directory path "/home/jonathan/anaconda3/envs/anno_env/plugins/iconengines" ...
                                        QFactoryLoader::QFactoryLoader() looking at "/home/jonathan/anaconda3/envs/anno_env/plugins/iconengines/libqsvgicon.so"
                                        Found metadata in lib /home/jonathan/anaconda3/envs/anno_env/plugins/iconengines/libqsvgicon.so, metadata=
                                        {
                                        "IID": "org.qt-project.Qt.QIconEngineFactoryInterface",
                                        "MetaData": {
                                        "Keys": [
                                        "svg",
                                        "svgz",
                                        "svg.gz"
                                        ]
                                        },
                                        "className": "QSvgIconPlugin",
                                        "debug": false,
                                        "version": 329991
                                        }

                                        Got keys from plugin meta data ("svg", "svgz", "svg.gz")
                                        QFactoryLoader::QFactoryLoader() checking directory path "/home/jonathan/anaconda3/envs/anno_env/bin/iconengines" ...
                                        QFactoryLoader::QFactoryLoader() checking directory path "/home/jonathan/anaconda3/envs/anno_env/plugins/accessible" ...
                                        QFactoryLoader::QFactoryLoader() checking directory path "/home/jonathan/anaconda3/envs/anno_env/bin/accessible" ...

                                        1 Reply Last reply
                                        0
                                        • SGaistS Offline
                                          SGaistS Offline
                                          SGaist
                                          Lifetime Qt Champion
                                          wrote on last edited by
                                          #25

                                          Can you show the distortion you get ?

                                          I still suggest that you try to run your application with the Ubuntu provided PyQt5 to ensure it's something related to your conda installation and not your system.

                                          Interested in AI ? www.idiap.ch
                                          Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                                          L 1 Reply Last reply
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