Runtime error on Ubuntu 22.04 - Could not load the Qt platform plugin "xcb" #5974

abertagnon · 2022-05-16T15:51:32Z

When I execute the command python3 -m Orange.canvas i get the following error:

Warning: Ignoring XDG_SESSION_TYPE=wayland on Gnome. Use QT_QPA_PLATFORM=wayland to run on Wayland anyway.
qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

Available platform plugins are: eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, wayland-egl, wayland, wayland-xcomposite-egl, wayland-xcomposite-glx, webgl, xcb.

Aborted (core dumped)

The problem occurs on Ubuntu 22.04 fresh installation. I installed Orange via the command pip install orange3 (pip version 22.1, python version 3.10).

The text was updated successfully, but these errors were encountered:

ales-erjavec · 2022-05-20T13:32:33Z

Can you run

QT_DEBUG_PLUGINS=1 python3 -m Orange.canvas

and post the output.

abertagnon · 2022-05-23T10:19:56Z

Warning: Ignoring XDG_SESSION_TYPE=wayland on Gnome. Use QT_QPA_PLATFORM=wayland to run on Wayland anyway.
QFactoryLoader::QFactoryLoader() checking directory path "/home/studente/.local/lib/python3.10/site-packages/PyQt5/Qt5/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() looking at "/home/studente/.local/lib/python3.10/site-packages/PyQt5/Qt5/plugins/platforms/libqeglfs.so"
Found metadata in lib /home/studente/.local/lib/python3.10/site-packages/PyQt5/Qt5/plugins/platforms/libqeglfs.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "eglfs"
        ]
    },
    "archreq": 0,
    "className": "QEglFSIntegrationPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("eglfs")
QFactoryLoader::QFactoryLoader() looking at "/home/studente/.local/lib/python3.10/site-packages/PyQt5/Qt5/plugins/platforms/libqlinuxfb.so"
Found metadata in lib /home/studente/.local/lib/python3.10/site-packages/PyQt5/Qt5/plugins/platforms/libqlinuxfb.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "linuxfb"
        ]
    },
    "archreq": 0,
    "className": "QLinuxFbIntegrationPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("linuxfb")
QFactoryLoader::QFactoryLoader() looking at "/home/studente/.local/lib/python3.10/site-packages/PyQt5/Qt5/plugins/platforms/libqminimal.so"
Found metadata in lib /home/studente/.local/lib/python3.10/site-packages/PyQt5/Qt5/plugins/platforms/libqminimal.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "minimal"
        ]
    },
    "archreq": 0,
    "className": "QMinimalIntegrationPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("minimal")
QFactoryLoader::QFactoryLoader() looking at "/home/studente/.local/lib/python3.10/site-packages/PyQt5/Qt5/plugins/platforms/libqminimalegl.so"
Found metadata in lib /home/studente/.local/lib/python3.10/site-packages/PyQt5/Qt5/plugins/platforms/libqminimalegl.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "minimalegl"
        ]
    },
    "archreq": 0,
    "className": "QMinimalEglIntegrationPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("minimalegl")
QFactoryLoader::QFactoryLoader() looking at "/home/studente/.local/lib/python3.10/site-packages/PyQt5/Qt5/plugins/platforms/libqoffscreen.so"
Found metadata in lib /home/studente/.local/lib/python3.10/site-packages/PyQt5/Qt5/plugins/platforms/libqoffscreen.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "offscreen"
        ]
    },
    "archreq": 0,
    "className": "QOffscreenIntegrationPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("offscreen")
QFactoryLoader::QFactoryLoader() looking at "/home/studente/.local/lib/python3.10/site-packages/PyQt5/Qt5/plugins/platforms/libqvnc.so"
Found metadata in lib /home/studente/.local/lib/python3.10/site-packages/PyQt5/Qt5/plugins/platforms/libqvnc.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "vnc"
        ]
    },
    "archreq": 0,
    "className": "QVncIntegrationPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("vnc")
QFactoryLoader::QFactoryLoader() looking at "/home/studente/.local/lib/python3.10/site-packages/PyQt5/Qt5/plugins/platforms/libqwayland-egl.so"
Found metadata in lib /home/studente/.local/lib/python3.10/site-packages/PyQt5/Qt5/plugins/platforms/libqwayland-egl.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "wayland-egl"
        ]
    },
    "archreq": 0,
    "className": "QWaylandEglPlatformIntegrationPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("wayland-egl")
QFactoryLoader::QFactoryLoader() looking at "/home/studente/.local/lib/python3.10/site-packages/PyQt5/Qt5/plugins/platforms/libqwayland-generic.so"
Found metadata in lib /home/studente/.local/lib/python3.10/site-packages/PyQt5/Qt5/plugins/platforms/libqwayland-generic.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "wayland"
        ]
    },
    "archreq": 0,
    "className": "QWaylandIntegrationPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("wayland")
QFactoryLoader::QFactoryLoader() looking at "/home/studente/.local/lib/python3.10/site-packages/PyQt5/Qt5/plugins/platforms/libqwayland-xcomposite-egl.so"
Found metadata in lib /home/studente/.local/lib/python3.10/site-packages/PyQt5/Qt5/plugins/platforms/libqwayland-xcomposite-egl.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "wayland-xcomposite-egl"
        ]
    },
    "archreq": 0,
    "className": "QWaylandXCompositeEglPlatformIntegrationPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("wayland-xcomposite-egl")
QFactoryLoader::QFactoryLoader() looking at "/home/studente/.local/lib/python3.10/site-packages/PyQt5/Qt5/plugins/platforms/libqwayland-xcomposite-glx.so"
Found metadata in lib /home/studente/.local/lib/python3.10/site-packages/PyQt5/Qt5/plugins/platforms/libqwayland-xcomposite-glx.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "wayland-xcomposite-glx"
        ]
    },
    "archreq": 0,
    "className": "QWaylandXCompositeGlxPlatformIntegrationPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("wayland-xcomposite-glx")
QFactoryLoader::QFactoryLoader() looking at "/home/studente/.local/lib/python3.10/site-packages/PyQt5/Qt5/plugins/platforms/libqwebgl.so"
Found metadata in lib /home/studente/.local/lib/python3.10/site-packages/PyQt5/Qt5/plugins/platforms/libqwebgl.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "webgl"
        ]
    },
    "archreq": 0,
    "className": "QWebGLIntegrationPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("webgl")
QFactoryLoader::QFactoryLoader() looking at "/home/studente/.local/lib/python3.10/site-packages/PyQt5/Qt5/plugins/platforms/libqxcb.so"
Found metadata in lib /home/studente/.local/lib/python3.10/site-packages/PyQt5/Qt5/plugins/platforms/libqxcb.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "xcb"
        ]
    },
    "archreq": 0,
    "className": "QXcbIntegrationPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("xcb")
QFactoryLoader::QFactoryLoader() checking directory path "/usr/bin/platforms" ...
Cannot load library /home/studente/.local/lib/python3.10/site-packages/PyQt5/Qt5/plugins/platforms/libqxcb.so: (libxcb-xinerama.so.0: cannot open shared object file: No such file or directory)
QLibraryPrivate::loadPlugin failed on "/home/studente/.local/lib/python3.10/site-packages/PyQt5/Qt5/plugins/platforms/libqxcb.so" : "Cannot load library /home/studente/.local/lib/python3.10/site-packages/PyQt5/Qt5/plugins/platforms/libqxcb.so: (libxcb-xinerama.so.0: cannot open shared object file: No such file or directory)"
qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

Available platform plugins are: eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, wayland-egl, wayland, wayland-xcomposite-egl, wayland-xcomposite-glx, webgl, xcb.
Aborted (core dumped)

ales-erjavec · 2022-05-23T10:36:08Z

...
QLibraryPrivate::loadPlugin failed on "/home/studente/.local/lib/python3.10/site-packages/PyQt5/Qt5/plugins/platforms/libqxcb.so" : "Cannot load library /home/studente/.local/lib/python3.10/site-packages/PyQt5/Qt5/plugins/platforms/libqxcb.so: (libxcb-xinerama.so.0: cannot open shared object file: No such file or directory)"
...

try

sudo apt-get install libxcb-xinerama0

ales-erjavec · 2022-05-23T10:38:38Z

You might need to also install any of the following

libxkbcommon-x11-0 libxcb-icccm4 libxcb-image0 libxcb-keysyms1 libxcb-randr0 libxcb-render-util0 libxcb-xinerama0 libxcb-xfixes0 libegl1-mesa

i.e.

sudo apt-get install libxkbcommon-x11-0 libxcb-icccm4 libxcb-image0 libxcb-keysyms1 libxcb-randr0 libxcb-render-util0 libxcb-xinerama0 libxcb-xfixes0 libegl1-mesa

abertagnon · 2022-05-23T13:13:21Z

Running
sudo apt-get install libxcb-xinerama0
and then
sudo apt-get install libxkbcommon-x11-0 libxcb-icccm4 libxcb-image0 libxcb-keysyms1 libxcb-randr0 libxcb-render-util0 libxcb-xinerama0 libxcb-xfixes0 libegl1-mesa
Solved the problem.

UPC-PaalDriveklepp · 2022-11-11T08:39:06Z

For me, running sudo apt-get install libxcb-xinerama0 was enough

rafaeljcg20 · 2023-01-20T17:48:01Z

Thanks

it's working too

cloudmanbr · 2023-03-11T00:10:49Z

Works for me too! Thanks guys!

sudo apt-get install libxcb-xinerama0

mbark125 · 2023-03-12T14:19:09Z

[G4]
[G4] **************************************************************
[G4] Geant4 version Name: geant4-11-00-patch-01 (8-March-2022)
[G4] Copyright : Geant4 Collaboration
[G4] References : NIM A 506 (2003), 250-303
[G4] : IEEE-TNS 53 (2006), 270-278
[G4] : NIM A 835 (2016), 186-225
[G4] WWW : http://geant4.org/
[G4] **************************************************************
[G4]
[Core-0] Initialization of geometry
[Core-0] Initialization of physics
[Core-0] Initialization of actors
[G4] Available UI session types: [ Qt, tcsh, csh ]
Warning: Ignoring XDG_SESSION_TYPE=wayland on Gnome. Use QT_QPA_PLATFORM=wayland to run on Wayland anyway.
qt.qpa.plugin: Could not find the Qt platform plugin "wayland-egl" in ""
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

Available platform plugins are: eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, xcb.

CAUGHT SIGNAL: 6 ### address: 0x3e8000011a7, signal = SIGABRT, value = 6, description = abort program (formerly SIGIOT).

Backtrace:
[PID=4519, TID=-2][ 0/15]> /lib/x86_64-linux-gnu/libc.so.6(gsignal+0xcb) [0x7f7db075a00b]
[PID=4519, TID=-2][ 1/15]> /lib/x86_64-linux-gnu/libc.so.6(abort+0x12b) [0x7f7db0739859]
[PID=4519, TID=-2][ 2/15]> /snap/gate/41/usr/lib/x86_64-linux-gnu/libQt5Core.so.5(+0x85aad) [0x7f7db5153aad]
[PID=4519, TID=-2][ 3/15]> /snap/gate/41/usr/lib/x86_64-linux-gnu/libQt5Gui.so.5(_ZN22QGuiApplicationPrivate25createPlatformIntegrationEv+0x111e) [0x7f7daf9657ae]
[PID=4519, TID=-2][ 4/15]> /snap/gate/41/usr/lib/x86_64-linux-gnu/libQt5Gui.so.5(_ZN22QGuiApplicationPrivate21createEventDispatcherEv+0x38) [0x7f7daf966708]
[PID=4519, TID=-2][ 5/15]> /snap/gate/41/usr/lib/x86_64-linux-gnu/libQt5Core.so.5(_ZN23QCoreApplicationPrivate4initEv+0xae5) [0x7f7db535af55]
[PID=4519, TID=-2][ 6/15]> /snap/gate/41/usr/lib/x86_64-linux-gnu/libQt5Gui.so.5(_ZN22QGuiApplicationPrivate4initEv+0x33) [0x7f7daf968543]
[PID=4519, TID=-2][ 7/15]> /snap/gate/41/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5(_ZN19QApplicationPrivate4initEv+0xd) [0x7f7daffa33bd]
[PID=4519, TID=-2][ 8/15]> /snap/gate/41/usr/local/lib/libG4interfaces.so(ZN4G4QtC2EiPPcS0+0xf6) [0x7f7db5674746]
[PID=4519, TID=-2][ 9/15]> /snap/gate/41/usr/local/lib/libG4interfaces.so(ZN4G4Qt11getInstanceEiPPcS0+0x55) [0x7f7db56748b5]
[PID=4519, TID=-2][10/15]> /snap/gate/41/usr/local/lib/libG4interfaces.so(_ZN6G4UIQtC1EiPPc+0x26c) [0x7f7db565eb2c]
[PID=4519, TID=-2][11/15]> /snap/gate/41/usr/local/lib/libG4interfaces.so(_ZN13G4UIExecutiveC2EiPPcRK8G4String+0x664) [0x7f7db5641064]
[PID=4519, TID=-2][12/15]> /snap/gate/41/usr/local/bin/Gate(+0xe6dc3) [0x5606252e4dc3]
[PID=4519, TID=-2][13/15]> /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf3) [0x7f7db073b083]
[PID=4519, TID=-2][14/15]> /snap/gate/41/usr/local/bin/Gate(+0x12a58e) [0x56062532858e]

: Aborted (Signal sent by tkill() 4519 1000)
Abandon (core dumped)

sirEgghead · 2024-04-30T23:04:18Z

Running sudo apt-get install libxcb-xinerama0 and then sudo apt-get install libxkbcommon-x11-0 libxcb-icccm4 libxcb-image0 libxcb-keysyms1 libxcb-randr0 libxcb-render-util0 libxcb-xinerama0 libxcb-xfixes0 libegl1-mesa Solved the problem.

This worked for me, with the addition of installing libxcb-cursor.

Qunut999 · 2024-07-17T08:49:23Z

...
QLibraryPrivate::loadPlugin failed on "/home/studente/.local/lib/python3.10/site-packages/PyQt5/Qt5/plugins/platforms/libqxcb.so" : "Cannot load library /home/studente/.local/lib/python3.10/site-packages/PyQt5/Qt5/plugins/platforms/libqxcb.so: (libxcb-xinerama.so.0: cannot open shared object file: No such file or directory)"
...

try

sudo apt-get install libxcb-xinerama0

You might need to also install any of the following

libxkbcommon-x11-0 libxcb-icccm4 libxcb-image0 libxcb-keysyms1 libxcb-randr0 libxcb-render-util0 libxcb-xinerama0 libxcb-xfixes0 libegl1-mesa

i.e.

sudo apt-get install libxkbcommon-x11-0 libxcb-icccm4 libxcb-image0 libxcb-keysyms1 libxcb-randr0 libxcb-render-util0 libxcb-xinerama0 libxcb-xfixes0 libegl1-mesa

You might need to also install any of the following

libxkbcommon-x11-0 libxcb-icccm4 libxcb-image0 libxcb-keysyms1 libxcb-randr0 libxcb-render-util0 libxcb-xinerama0 libxcb-xfixes0 libegl1-mesa

i.e.

sudo apt-get install libxkbcommon-x11-0 libxcb-icccm4 libxcb-image0 libxcb-keysyms1 libxcb-randr0 libxcb-render-util0 libxcb-xinerama0 libxcb-xfixes0 libegl1-mesa

Hello @ales-erjavec,

Thank you for your suggestions on the related issue. I'm encountering a similar problem with the Qt platform plugin "offscreen" failing to load, and the error message I receive is:

QLibraryPrivate::loadPlugin failed on "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqoffscreen.so" : "Cannot load library /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqoffscreen.so: (/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqoffscreen.so: undefined symbol: _ZNK20QPlatformIntegration28createPlatformVulkanInstanceEP15QVulkanInstance, version Qt_5_PRIVATE_API)"

This suggests an issue with the Qt platform plugin initialization. Could you please advise if there are any specific packages or steps I should consider to resolve this issue?

Thank you for your help!

redthing1 · 2024-09-06T18:01:30Z

@Qunut999 I have the same issue:

_ZNK20QPlatformIntegration28createPlatformVulkanInstanceEP15QVulkanInstance

in particular is missing, and I don't know why. I tried building Qt from source, same issue.

FirmoDev · 2024-10-12T20:41:33Z

Running sudo apt-get install libxcb-xinerama0 and then sudo apt-get install libxkbcommon-x11-0 libxcb-icccm4 libxcb-image0 libxcb-keysyms1 libxcb-randr0 libxcb-render-util0 libxcb-xinerama0 libxcb-xfixes0 libegl1-mesa Solved the problem.

thank you! but why? I wanted to understand why this solved the problem..

abertagnon added the bug report Bug is reported by user, not yet confirmed by the core team label May 16, 2022

abertagnon mentioned this issue May 20, 2022

Debian 10 support - libQt5Core.so.5: version Qt_5.15 not found #5976

Closed

abertagnon closed this as completed May 23, 2022

Colorjet3 mentioned this issue May 22, 2023

Openshot 3.0 doe snot launch on Ubuntu 20.04 OpenShot/openshot-qt#5133

Open

j1elo mentioned this issue Jun 7, 2023

qt.qpa.plugin: Could not load the Qt platform plugin "xcb" zeroepoch/plotbitrate#28

Closed

Provide feedback

Saved searches

Use saved searches to filter your results more quickly

Runtime error on Ubuntu 22.04 - Could not load the Qt platform plugin "xcb" #5974

Runtime error on Ubuntu 22.04 - Could not load the Qt platform plugin "xcb" #5974

abertagnon commented May 16, 2022

ales-erjavec commented May 20, 2022

abertagnon commented May 23, 2022

ales-erjavec commented May 23, 2022

ales-erjavec commented May 23, 2022

abertagnon commented May 23, 2022

UPC-PaalDriveklepp commented Nov 11, 2022

rafaeljcg20 commented Jan 20, 2023

cloudmanbr commented Mar 11, 2023 •

edited

Loading

mbark125 commented Mar 12, 2023

sirEgghead commented Apr 30, 2024

Qunut999 commented Jul 17, 2024

redthing1 commented Sep 6, 2024

FirmoDev commented Oct 12, 2024

Runtime error on Ubuntu 22.04 - Could not load the Qt platform plugin "xcb" #5974

Runtime error on Ubuntu 22.04 - Could not load the Qt platform plugin "xcb" #5974

Comments

abertagnon commented May 16, 2022

ales-erjavec commented May 20, 2022

abertagnon commented May 23, 2022

ales-erjavec commented May 23, 2022

ales-erjavec commented May 23, 2022

abertagnon commented May 23, 2022

UPC-PaalDriveklepp commented Nov 11, 2022

rafaeljcg20 commented Jan 20, 2023

cloudmanbr commented Mar 11, 2023 • edited Loading

mbark125 commented Mar 12, 2023

CAUGHT SIGNAL: 6 ### address: 0x3e8000011a7, signal = SIGABRT, value = 6, description = abort program (formerly SIGIOT).

sirEgghead commented Apr 30, 2024

Qunut999 commented Jul 17, 2024

redthing1 commented Sep 6, 2024

FirmoDev commented Oct 12, 2024

cloudmanbr commented Mar 11, 2023 •

edited

Loading