Qt 6 fresh installation - can't launch QtCreator

[johnyboy]

I've installed Qt 6 and I can't launch QtCreator.

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

inside the directory

~/Qt/Tools/QtCreator/lib/Qt/plugins/platforms

there are the following files:

libqeglfs.so libqlinuxfb.so libqminimalegl.so libqminimal.so libqoffscreen.so libqvnc.so libqxcb.so

I've installed already mesa-common-dev and other packages.

What is the solution to this strange problem after a fresh installation?

[jsulm]

@johnyboy Install libxcb-util1 package
See here for needed packages: https://doc.qt.io/qt-5/linux-requirements.html

[jsulm]

@johnyboy said in Qt 6 fresh installation - can't launch QtCreator:

What is the solution to this strange problem after a fresh installation?

Open a terminal and do

export QT_DEBUG_PLUGINS=1
# Start QtCreator
PATH_TO_QTCREATOR_EXE

Post the output from the terminal here.

[johnyboy]

@jsulm Opened terminal and entered "export QT_DEBUG_PLUGINS=1". After running QtCreator I get:

Cannot load library /home/johny/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/johny/Qt/Tools/QtCreator/lib/Qt/plugins/platforms/libqxcb.so" : "Cannot load library /home/johny/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.

[jsulm]

@johnyboy Install libxcb-util1 package
See here for needed packages: https://doc.qt.io/qt-5/linux-requirements.html

[johnyboy]

@jsulm Do you mean libxcb-util0 and libxcb-util0-dev perhaps because I can't find anything with libxcb-util1 when I type sudo apt? Or I have to build it from scratch?

[jsulm]

@johnyboy said in Qt 6 fresh installation - can't launch QtCreator:

libxcb-util0

This one. Dev package shouldn't be needed. In my distribution it is called libxcb-util1

[johnyboy]

@jsulm It worked! I already had libxcb-util0 installed but that didn't work with Qt6, so I manually installed libxcb-util1 and it works perfectly, thanks!