Electron-cash: can't start AppImage on fresh Xubuntu 19.04 - "qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found."

Created on 17 Jan 2020 · 8Comments · Source: Electron-Cash/Electron-Cash

Running off the Xubuntu 19.04 live USB stick:

xubuntu@xubuntu:~/Downloads$ ./Electron-Cash-4.0.12-x86_64.AppImage 
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)

When I apt-installed system package python3-pyqt5, this error went away and AppImage started fine. I think the AppImage is missing a .so file somehow... will look into it more.

Linux packaging

Source

markblundeberg

Most helpful comment

I can reproduce the issue in a VM. When you install the libxkbcommon-x11-0 package it will work:

apt update && apt install libxkbcommon-x11-0

I'll see if we can include this library into the AppImage without breaking older distros.

EchterAgo on 17 Jan 2020

👍2 🚀1 ❤1 🎉1

All 8 comments

Longer dump:

xubuntu@xubuntu:~$ QT_DEBUG_PLUGINS=1 ./Electron-Cash-4.0.13-dev1-14-g6f41b0270-x86_64.AppImage 
QFactoryLoader::QFactoryLoader() checking directory path "/tmp/.mount_ElectrhVtMUP/usr/lib/python3.6/site-packages/PyQt5/Qt/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() looking at "/tmp/.mount_ElectrhVtMUP/usr/lib/python3.6/site-packages/PyQt5/Qt/plugins/platforms/libqeglfs.so"
Found metadata in lib /tmp/.mount_ElectrhVtMUP/usr/lib/python3.6/site-packages/PyQt5/Qt/plugins/platforms/libqeglfs.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "eglfs"
        ]
    },
    "archreq": 0,
    "className": "QEglFSIntegrationPlugin",
    "debug": false,
    "version": 331008
}


Got keys from plugin meta data ("eglfs")
QFactoryLoader::QFactoryLoader() looking at "/tmp/.mount_ElectrhVtMUP/usr/lib/python3.6/site-packages/PyQt5/Qt/plugins/platforms/libqlinuxfb.so"
Found metadata in lib /tmp/.mount_ElectrhVtMUP/usr/lib/python3.6/site-packages/PyQt5/Qt/plugins/platforms/libqlinuxfb.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "linuxfb"
        ]
    },
    "archreq": 0,
    "className": "QLinuxFbIntegrationPlugin",
    "debug": false,
    "version": 331008
}


Got keys from plugin meta data ("linuxfb")
QFactoryLoader::QFactoryLoader() looking at "/tmp/.mount_ElectrhVtMUP/usr/lib/python3.6/site-packages/PyQt5/Qt/plugins/platforms/libqminimal.so"
Found metadata in lib /tmp/.mount_ElectrhVtMUP/usr/lib/python3.6/site-packages/PyQt5/Qt/plugins/platforms/libqminimal.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "minimal"
        ]
    },
    "archreq": 0,
    "className": "QMinimalIntegrationPlugin",
    "debug": false,
    "version": 331008
}


Got keys from plugin meta data ("minimal")
QFactoryLoader::QFactoryLoader() looking at "/tmp/.mount_ElectrhVtMUP/usr/lib/python3.6/site-packages/PyQt5/Qt/plugins/platforms/libqminimalegl.so"
Found metadata in lib /tmp/.mount_ElectrhVtMUP/usr/lib/python3.6/site-packages/PyQt5/Qt/plugins/platforms/libqminimalegl.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "minimalegl"
        ]
    },
    "archreq": 0,
    "className": "QMinimalEglIntegrationPlugin",
    "debug": false,
    "version": 331008
}


Got keys from plugin meta data ("minimalegl")
QFactoryLoader::QFactoryLoader() looking at "/tmp/.mount_ElectrhVtMUP/usr/lib/python3.6/site-packages/PyQt5/Qt/plugins/platforms/libqoffscreen.so"
Found metadata in lib /tmp/.mount_ElectrhVtMUP/usr/lib/python3.6/site-packages/PyQt5/Qt/plugins/platforms/libqoffscreen.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "offscreen"
        ]
    },
    "archreq": 0,
    "className": "QOffscreenIntegrationPlugin",
    "debug": false,
    "version": 331008
}


Got keys from plugin meta data ("offscreen")
QFactoryLoader::QFactoryLoader() looking at "/tmp/.mount_ElectrhVtMUP/usr/lib/python3.6/site-packages/PyQt5/Qt/plugins/platforms/libqvnc.so"
Found metadata in lib /tmp/.mount_ElectrhVtMUP/usr/lib/python3.6/site-packages/PyQt5/Qt/plugins/platforms/libqvnc.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "vnc"
        ]
    },
    "archreq": 0,
    "className": "QVncIntegrationPlugin",
    "debug": false,
    "version": 331008
}


Got keys from plugin meta data ("vnc")
QFactoryLoader::QFactoryLoader() looking at "/tmp/.mount_ElectrhVtMUP/usr/lib/python3.6/site-packages/PyQt5/Qt/plugins/platforms/libqwayland-egl.so"
Found metadata in lib /tmp/.mount_ElectrhVtMUP/usr/lib/python3.6/site-packages/PyQt5/Qt/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": 331008
}


Got keys from plugin meta data ("wayland-egl")
QFactoryLoader::QFactoryLoader() looking at "/tmp/.mount_ElectrhVtMUP/usr/lib/python3.6/site-packages/PyQt5/Qt/plugins/platforms/libqwayland-generic.so"
Found metadata in lib /tmp/.mount_ElectrhVtMUP/usr/lib/python3.6/site-packages/PyQt5/Qt/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": 331008
}


Got keys from plugin meta data ("wayland")
QFactoryLoader::QFactoryLoader() looking at "/tmp/.mount_ElectrhVtMUP/usr/lib/python3.6/site-packages/PyQt5/Qt/plugins/platforms/libqwayland-xcomposite-egl.so"
Found metadata in lib /tmp/.mount_ElectrhVtMUP/usr/lib/python3.6/site-packages/PyQt5/Qt/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": 331008
}


Got keys from plugin meta data ("wayland-xcomposite-egl")
QFactoryLoader::QFactoryLoader() looking at "/tmp/.mount_ElectrhVtMUP/usr/lib/python3.6/site-packages/PyQt5/Qt/plugins/platforms/libqwayland-xcomposite-glx.so"
Found metadata in lib /tmp/.mount_ElectrhVtMUP/usr/lib/python3.6/site-packages/PyQt5/Qt/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": 331008
}


Got keys from plugin meta data ("wayland-xcomposite-glx")
QFactoryLoader::QFactoryLoader() looking at "/tmp/.mount_ElectrhVtMUP/usr/lib/python3.6/site-packages/PyQt5/Qt/plugins/platforms/libqwebgl.so"
Found metadata in lib /tmp/.mount_ElectrhVtMUP/usr/lib/python3.6/site-packages/PyQt5/Qt/plugins/platforms/libqwebgl.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "webgl"
        ]
    },
    "archreq": 0,
    "className": "QWebGLIntegrationPlugin",
    "debug": false,
    "version": 331008
}


Got keys from plugin meta data ("webgl")
QFactoryLoader::QFactoryLoader() looking at "/tmp/.mount_ElectrhVtMUP/usr/lib/python3.6/site-packages/PyQt5/Qt/plugins/platforms/libqxcb.so"
Found metadata in lib /tmp/.mount_ElectrhVtMUP/usr/lib/python3.6/site-packages/PyQt5/Qt/plugins/platforms/libqxcb.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "xcb"
        ]
    },
    "archreq": 0,
    "className": "QXcbIntegrationPlugin",
    "debug": false,
    "version": 331008
}


Got keys from plugin meta data ("xcb")
QFactoryLoader::QFactoryLoader() checking directory path "/tmp/.mount_ElectrhVtMUP/usr/bin/platforms" ...
Cannot load library /tmp/.mount_ElectrhVtMUP/usr/lib/python3.6/site-packages/PyQt5/Qt/plugins/platforms/libqxcb.so: (libxkbcommon-x11.so.0: cannot open shared object file: No such file or directory)
QLibraryPrivate::loadPlugin failed on "/tmp/.mount_ElectrhVtMUP/usr/lib/python3.6/site-packages/PyQt5/Qt/plugins/platforms/libqxcb.so" : "Cannot load library /tmp/.mount_ElectrhVtMUP/usr/lib/python3.6/site-packages/PyQt5/Qt/plugins/platforms/libqxcb.so: (libxkbcommon-x11.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)

markblundeberg on 17 Jan 2020

"libxkbcommon-x11.so.0: cannot open shared object file: No such file or directory"

markblundeberg on 17 Jan 2020

Hmm, not sure why this isn't picked up during AppImage build. It is not on the exclude list:

https://github.com/AppImage/pkg2appimage/blob/master/excludelist

Maybe it gets loaded via dlopen by libqxcb.so

EchterAgo on 17 Jan 2020

I can reproduce the issue in a VM. When you install the libxkbcommon-x11-0 package it will work:

apt update && apt install libxkbcommon-x11-0

I'll see if we can include this library into the AppImage without breaking older distros.

EchterAgo on 17 Jan 2020

👍2 🚀1 ❤1 🎉1

Oh man I love you @EchterAgo .. that would be awesome. ❤️

cculianu on 17 Jan 2020

Fixed in master branch.

EchterAgo on 21 Jan 2020

W00! Thanks Axel! :D

cculianu on 21 Jan 2020

(also cherry-picked over to cashfusion branch just now)

cculianu on 21 Jan 2020

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