I can't open qtcreator in ubuntu

CEmori

@SGaist Hey, I'm getting the same problem as OP

"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, xcb.

Aborted (memory dump)"

changing the QT_DEBUG_PLUGINS variable did not change it. I reinstalled it aswell.

SGaist

Hi and welcome to devnet,

This environment variable triggers debugging output on the console so you get more information about what is failing.

Did you install the libraries @Leon-Abascal suggested ?

CEmori

@SGaist installing the missing libraries helped! Thanks a lot.

spara7c5

@Leon-Abascal you save my life! Same problem and same working solution! (ubuntu 21.04 in virtualbox)

KUMAR13

@marbor :
export QT_DEBUG_PLUGINS=1
./qtcreator
show error: Qt/Tools/QtCreator/lib/Qt/plugins/platforms/libqxcb.so" : "Cannot load library
installed : sudo apt-get install --reinstall libxcb-xinerama0
this worked for me.
after installation: go for this command ./qtcreator

f0rg3

So I've done a number of things to try to correct this issue. Firstly, I'm on Debian 10. I installed Qt in a directory like this: /home/kevin/Applications/Qt

I've already tried reinstalling libxcb-xinerama0 as well as uninstalling and reinstalling Qt.
Here is the debug output:

./qtcreator
QFactoryLoader::QFactoryLoader() checking directory path "/home/kevin/Applications/Qt/Tools/QtCreator/lib/Qt/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() looking at "/home/kevin/Applications/Qt/Tools/QtCreator/lib/Qt/plugins/platforms/libqeglfs.so"
Found metadata in lib /home/kevin/Applications/Qt/Tools/QtCreator/lib/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": 331520
}


Got keys from plugin meta data ("eglfs")
QFactoryLoader::QFactoryLoader() looking at "/home/kevin/Applications/Qt/Tools/QtCreator/lib/Qt/plugins/platforms/libqlinuxfb.so"
Found metadata in lib /home/kevin/Applications/Qt/Tools/QtCreator/lib/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": 331520
}


Got keys from plugin meta data ("linuxfb")
QFactoryLoader::QFactoryLoader() looking at "/home/kevin/Applications/Qt/Tools/QtCreator/lib/Qt/plugins/platforms/libqminimal.so"
Found metadata in lib /home/kevin/Applications/Qt/Tools/QtCreator/lib/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": 331520
}


Got keys from plugin meta data ("minimal")
QFactoryLoader::QFactoryLoader() looking at "/home/kevin/Applications/Qt/Tools/QtCreator/lib/Qt/plugins/platforms/libqminimalegl.so"
Found metadata in lib /home/kevin/Applications/Qt/Tools/QtCreator/lib/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": 331520
}


Got keys from plugin meta data ("minimalegl")
QFactoryLoader::QFactoryLoader() looking at "/home/kevin/Applications/Qt/Tools/QtCreator/lib/Qt/plugins/platforms/libqoffscreen.so"
Found metadata in lib /home/kevin/Applications/Qt/Tools/QtCreator/lib/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": 331520
}


Got keys from plugin meta data ("offscreen")
QFactoryLoader::QFactoryLoader() looking at "/home/kevin/Applications/Qt/Tools/QtCreator/lib/Qt/plugins/platforms/libqvnc.so"
Found metadata in lib /home/kevin/Applications/Qt/Tools/QtCreator/lib/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": 331520
}


Got keys from plugin meta data ("vnc")
QFactoryLoader::QFactoryLoader() looking at "/home/kevin/Applications/Qt/Tools/QtCreator/lib/Qt/plugins/platforms/libqxcb.so"
Found metadata in lib /home/kevin/Applications/Qt/Tools/QtCreator/lib/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": 331520
}


Got keys from plugin meta data ("xcb")
QFactoryLoader::QFactoryLoader() checking directory path "/home/kevin/Applications/Qt/Tools/QtCreator/bin/platforms" ...
Cannot load library /home/kevin/Applications/Qt/Tools/QtCreator/lib/Qt/plugins/platforms/libqxcb.so: (libxcb-util.so.1: cannot open shared object file: No such file or directory)
QLibraryPrivate::loadPlugin failed on "/home/kevin/Applications/Qt/Tools/QtCreator/lib/Qt/plugins/platforms/libqxcb.so" : "Cannot load library /home/kevin/Applications/Qt/Tools/QtCreator/lib/Qt/plugins/platforms/libqxcb.so: (libxcb-util.so.1: 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, xcb.

Aborted

As reccomended by @hskoglund in qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.:

Hi, try: ldd /usr/lib/qt/plugins/platforms/libqxcb.so

The output of

ldd /home/kevin/Applications/Qt/Tools/QtCreator/lib/Qt/plugins/platforms/libqxcb.so

is

	linux-vdso.so.1 (0x00007fff96d31000)
	libQt5XcbQpa.so.5 => /home/kevin/Applications/Qt/Tools/QtCreator/lib/Qt/plugins/platforms/../../lib/libQt5XcbQpa.so.5 (0x00007f5121d3a000)
	libfontconfig.so.1 => /lib/x86_64-linux-gnu/libfontconfig.so.1 (0x00007f5121cde000)
	libfreetype.so.6 => /lib/x86_64-linux-gnu/libfreetype.so.6 (0x00007f5121c22000)
	libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007f5121a04000)
	libQt5Gui.so.5 => /home/kevin/Applications/Qt/Tools/QtCreator/lib/Qt/plugins/platforms/../../lib/libQt5Gui.so.5 (0x00007f51210d3000)
	libQt5DBus.so.5 => /home/kevin/Applications/Qt/Tools/QtCreator/lib/Qt/plugins/platforms/../../lib/libQt5DBus.so.5 (0x00007f5120e45000)
	libQt5Core.so.5 => /home/kevin/Applications/Qt/Tools/QtCreator/lib/Qt/plugins/platforms/../../lib/libQt5Core.so.5 (0x00007f512064f000)
	libGL.so.1 => /lib/x86_64-linux-gnu/libGL.so.1 (0x00007f51205bb000)
	libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f512059a000)
	libX11-xcb.so.1 => /lib/x86_64-linux-gnu/libX11-xcb.so.1 (0x00007f5120595000)
	libxcb-icccm.so.4 => /lib/x86_64-linux-gnu/libxcb-icccm.so.4 (0x00007f512058e000)
	libxcb-image.so.0 => /lib/x86_64-linux-gnu/libxcb-image.so.0 (0x00007f5120389000)
	libxcb-shm.so.0 => /lib/x86_64-linux-gnu/libxcb-shm.so.0 (0x00007f5120382000)
	libxcb-util.so.1 => not found
	libxcb-keysyms.so.1 => /lib/x86_64-linux-gnu/libxcb-keysyms.so.1 (0x00007f512017f000)
	libxcb-randr.so.0 => /lib/x86_64-linux-gnu/libxcb-randr.so.0 (0x00007f512016d000)
	libxcb-render-util.so.0 => /lib/x86_64-linux-gnu/libxcb-render-util.so.0 (0x00007f511ff69000)
	libxcb-render.so.0 => /lib/x86_64-linux-gnu/libxcb-render.so.0 (0x00007f511ff5a000)
	libxcb-shape.so.0 => /lib/x86_64-linux-gnu/libxcb-shape.so.0 (0x00007f511ff53000)
	libxcb-sync.so.1 => /lib/x86_64-linux-gnu/libxcb-sync.so.1 (0x00007f511ff49000)
	libxcb-xfixes.so.0 => /lib/x86_64-linux-gnu/libxcb-xfixes.so.0 (0x00007f511ff3f000)
	libxcb-xinerama.so.0 => /lib/x86_64-linux-gnu/libxcb-xinerama.so.0 (0x00007f511ff3a000)
	libxcb-xkb.so.1 => /lib/x86_64-linux-gnu/libxcb-xkb.so.1 (0x00007f511ff1c000)
	libxcb.so.1 => /lib/x86_64-linux-gnu/libxcb.so.1 (0x00007f511fef2000)
	libXext.so.6 => /lib/x86_64-linux-gnu/libXext.so.6 (0x00007f511fcde000)
	libX11.so.6 => /lib/x86_64-linux-gnu/libX11.so.6 (0x00007f511fb9d000)
	libxkbcommon-x11.so.0 => /lib/x86_64-linux-gnu/libxkbcommon-x11.so.0 (0x00007f511fb92000)
	libxkbcommon.so.0 => /lib/x86_64-linux-gnu/libxkbcommon.so.0 (0x00007f511fb50000)
	libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f511fb4b000)
	libstdc++.so.6 => /lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007f511f9c7000)
	libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f511f842000)
	libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007f511f828000)
	libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f511f667000)
	libxcb-util.so.1 => not found
	libgthread-2.0.so.0 => /lib/x86_64-linux-gnu/libgthread-2.0.so.0 (0x00007f511f662000)
	libglib-2.0.so.0 => /lib/x86_64-linux-gnu/libglib-2.0.so.0 (0x00007f511f543000)
	libexpat.so.1 => /lib/x86_64-linux-gnu/libexpat.so.1 (0x00007f511f504000)
	libuuid.so.1 => /lib/x86_64-linux-gnu/libuuid.so.1 (0x00007f511f4fb000)
	libpng16.so.16 => /lib/x86_64-linux-gnu/libpng16.so.16 (0x00007f511f4c2000)
	libdbus-1.so.3 => /lib/x86_64-linux-gnu/libdbus-1.so.3 (0x00007f511f46f000)
	libicui18n.so.56 => /home/kevin/Applications/Qt/Tools/QtCreator/lib/Qt/plugins/platforms/../../lib/libicui18n.so.56 (0x00007f511efd6000)
	libicuuc.so.56 => /home/kevin/Applications/Qt/Tools/QtCreator/lib/Qt/plugins/platforms/../../lib/libicuuc.so.56 (0x00007f511ec1c000)
	libicudata.so.56 => /home/kevin/Applications/Qt/Tools/QtCreator/lib/Qt/plugins/platforms/../../lib/libicudata.so.56 (0x00007f511d239000)
	/lib64/ld-linux-x86-64.so.2 (0x00007f5122299000)
	libGLX.so.0 => /lib/x86_64-linux-gnu/libGLX.so.0 (0x00007f511d205000)
	libGLdispatch.so.0 => /lib/x86_64-linux-gnu/libGLdispatch.so.0 (0x00007f511d148000)
	libxcb-util.so.0 => /lib/x86_64-linux-gnu/libxcb-util.so.0 (0x00007f511cf41000)
	libXau.so.6 => /lib/x86_64-linux-gnu/libXau.so.6 (0x00007f511cd3b000)
	libXdmcp.so.6 => /lib/x86_64-linux-gnu/libXdmcp.so.6 (0x00007f511cb35000)
	libpcre.so.3 => /lib/x86_64-linux-gnu/libpcre.so.3 (0x00007f511cac1000)
	libsystemd.so.0 => /lib/x86_64-linux-gnu/libsystemd.so.0 (0x00007f511ca20000)
	libbsd.so.0 => /lib/x86_64-linux-gnu/libbsd.so.0 (0x00007f511ca06000)
	librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x00007f511c9fa000)
	liblzma.so.5 => /lib/x86_64-linux-gnu/liblzma.so.5 (0x00007f511c9d2000)
	liblz4.so.1 => /lib/x86_64-linux-gnu/liblz4.so.1 (0x00007f511c9b3000)
	libgcrypt.so.20 => /lib/x86_64-linux-gnu/libgcrypt.so.20 (0x00007f511c895000)
	libgpg-error.so.0 => /lib/x86_64-linux-gnu/libgpg-error.so.0 (0x00007f511c872000)

Any and all help is greatly appreciated, thanks for your time.

jsulm

@f0rg3 said in I can't open qtcreator in ubuntu:

libxcb-util.so.1 => not found

Install libxcb-util package...

HeerokNewbie

@KUMAR13 thanks You saved my life

ma lingfeng

@KUMAR13 I have the same question that can be solved by your solution, thank you very much.

niffoxic

@KUMAR13 thank you works for me

jurc

@KUMAR13 said in I can't open qtcreator in ubuntu:

sudo apt-get install --reinstall libxcb-xinerama0
this worked for me.

on ubuntu server 20.04
sudo apt-get install libxcb-xinerama0
worked for me.
thx

StanGuo

@Leon-Abascal thank you Leon, now works