I am trying to run the code from here https://github.com/vt4a2h/uml-tool and I found myself stuck with this error message:
qt.qpa.xcb: could not connect to display
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.
I am using windows 10 with WSL 2 (Ubuntu 20.04.2 LTS)
What I've tried:
X.Org X Server 1.20.9
X Protocol Version 11, Revision 0
Build Operating System: Linux 4.15.0-130-generic x86_64 Ubuntu
Current Operating System: Linux NB-CJ-U4-5336 5.4.72-microsoft-standard-WSL2 #1 SMP Wed Oct 28 23:40:43 UTC 2020 x86_64
Kernel command line: initrd=\initrd.img panic=-1 pty.legacy_count=0 nr_cpus=12
Build Date: 17 January 2021 09:13:31AM
xorg-server 2:1.20.9-2ubuntu1.2~20.04.1 (For technical support please see http://www.ubuntu.com/support)
Current version of pixman: 0.38.4
Before reporting problems, check http://wiki.x.org
to make sure that you have the latest version.
Markers: (--) probed, (**) from config file, (==) default setting,
(++) from command line, (!!) notice, (II) informational,
(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(==) Log file: "/var/log/Xorg.0.log", Time: Tue Mar 16 17:32:21 2021
List of video drivers:
amdgpu
ati
intel
nouveau
qxl
radeon
vmware
modesetting
fbdev
vesa
No devices to configure. Configuration failed.
(EE) Server terminated with error (2). Closing log file.
I've also tried to add the following into the environment:
QT_DEBUG_PLUGINS=1
QT_QPA_PLATFORM_PLUGIN_PATH=/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/
XAUTHORITY=~/.Xauthority
And my new error message is:
QFactoryLoader::QFactoryLoader() checking directory path "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() looking at "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqeglfs.so"
Found metadata in lib /usr/lib/x86_64-linux-gnu/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": 330752
}
Got keys from plugin meta data ("eglfs")
QFactoryLoader::QFactoryLoader() looking at "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqlinuxfb.so"
Found metadata in lib /usr/lib/x86_64-linux-gnu/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": 330752
}
Got keys from plugin meta data ("linuxfb")
QFactoryLoader::QFactoryLoader() looking at "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqminimal.so"
Found metadata in lib /usr/lib/x86_64-linux-gnu/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": 330752
}
Got keys from plugin meta data ("minimal")
QFactoryLoader::QFactoryLoader() looking at "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqminimalegl.so"
Found metadata in lib /usr/lib/x86_64-linux-gnu/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": 330752
}
Got keys from plugin meta data ("minimalegl")
QFactoryLoader::QFactoryLoader() looking at "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqoffscreen.so"
Found metadata in lib /usr/lib/x86_64-linux-gnu/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": 330752
}
Got keys from plugin meta data ("offscreen")
QFactoryLoader::QFactoryLoader() looking at "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqvnc.so"
Found metadata in lib /usr/lib/x86_64-linux-gnu/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": 330752
}
Got keys from plugin meta data ("vnc")
QFactoryLoader::QFactoryLoader() looking at "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so"
Found metadata in lib /usr/lib/x86_64-linux-gnu/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": 330752
}
Got keys from plugin meta data ("xcb")
QFactoryLoader::QFactoryLoader() checking directory path "/usr/lib/x86_64-linux-gnu/qt5/plugins" ...
QFactoryLoader::QFactoryLoader() checking directory path "/mnt/c/MyPrograms/uml-tool/cmake-build-debug" ...
QFactoryLoader::QFactoryLoader() looking at "/mnt/c/MyPrograms/uml-tool/cmake-build-debug/cmake_install.cmake"
QElfParser: '/mnt/c/MyPrograms/uml-tool/cmake-build-debug/cmake_install.cmake' is not an ELF object
"'/mnt/c/MyPrograms/uml-tool/cmake-build-debug/cmake_install.cmake' is not an ELF object"
not a plugin
QFactoryLoader::QFactoryLoader() looking at "/mnt/c/MyPrograms/uml-tool/cmake-build-debug/CMakeCache.txt"
QElfParser: '/mnt/c/MyPrograms/uml-tool/cmake-build-debug/CMakeCache.txt' is not an ELF object
"'/mnt/c/MyPrograms/uml-tool/cmake-build-debug/CMakeCache.txt' is not an ELF object"
not a plugin
QFactoryLoader::QFactoryLoader() looking at "/mnt/c/MyPrograms/uml-tool/cmake-build-debug/Makefile"
QElfParser: '/mnt/c/MyPrograms/uml-tool/cmake-build-debug/Makefile' is not an ELF object
"'/mnt/c/MyPrograms/uml-tool/cmake-build-debug/Makefile' is not an ELF object"
not a plugin
QFactoryLoader::QFactoryLoader() looking at "/mnt/c/MyPrograms/uml-tool/cmake-build-debug/uml-tool"
"Failed to extract plugin meta data from '/mnt/c/MyPrograms/uml-tool/cmake-build-debug/uml-tool'"
not a plugin
QFactoryLoader::QFactoryLoader() looking at "/mnt/c/MyPrograms/uml-tool/cmake-build-debug/UmlTool.cbp"
QElfParser: '/mnt/c/MyPrograms/uml-tool/cmake-build-debug/UmlTool.cbp' is not an ELF object
"'/mnt/c/MyPrograms/uml-tool/cmake-build-debug/UmlTool.cbp' is not an ELF object"
not a plugin
QFactoryLoader::QFactoryLoader() checking directory path "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/platforms" ...
QFactoryLoader::QFactoryLoader() looking at "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/platforms/libqeglfs.so"
Got keys from plugin meta data ("eglfs")
QFactoryLoader::QFactoryLoader() looking at "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/platforms/libqlinuxfb.so"
Got keys from plugin meta data ("linuxfb")
QFactoryLoader::QFactoryLoader() looking at "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/platforms/libqminimal.so"
Got keys from plugin meta data ("minimal")
QFactoryLoader::QFactoryLoader() looking at "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/platforms/libqminimalegl.so"
Got keys from plugin meta data ("minimalegl")
QFactoryLoader::QFactoryLoader() looking at "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/platforms/libqoffscreen.so"
Got keys from plugin meta data ("offscreen")
QFactoryLoader::QFactoryLoader() looking at "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/platforms/libqvnc.so"
Got keys from plugin meta data ("vnc")
QFactoryLoader::QFactoryLoader() looking at "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/platforms/libqxcb.so"
Got keys from plugin meta data ("xcb")
QFactoryLoader::QFactoryLoader() checking directory path "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() looking at "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqeglfs.so"
Got keys from plugin meta data ("eglfs")
QFactoryLoader::QFactoryLoader() looking at "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqlinuxfb.so"
Got keys from plugin meta data ("linuxfb")
QFactoryLoader::QFactoryLoader() looking at "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqminimal.so"
Got keys from plugin meta data ("minimal")
QFactoryLoader::QFactoryLoader() looking at "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqminimalegl.so"
Got keys from plugin meta data ("minimalegl")
QFactoryLoader::QFactoryLoader() looking at "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqoffscreen.so"
Got keys from plugin meta data ("offscreen")
QFactoryLoader::QFactoryLoader() looking at "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqvnc.so"
Got keys from plugin meta data ("vnc")
QFactoryLoader::QFactoryLoader() looking at "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so"
Got keys from plugin meta data ("xcb")
QFactoryLoader::QFactoryLoader() checking directory path "/mnt/c/MyPrograms/uml-tool/cmake-build-debug/platforms" ...
loaded library "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so"
qt.qpa.xcb: could not connect to display
qt.qpa.xcb: could not connect to display
qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/" 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 (from /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/), linuxfb (from /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/), minimal (from /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/), minimalegl (from /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/), offscreen (from /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/), vnc (from /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/), xcb (from /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/), eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, xcb.
Process finished with exit code 134
All of the commands from above were run from ubuntu console
What should I do? How can I fix this?
You need an X11 server. The first Google result for "WSL X11" is https://virtualizationreview.com/articles/2017/02/08/graphical-programs-on-windows-subsystem-on-linux.aspx which says:
To use WSL with graphical programs, an X server will need to be installed on the Windows 10 system and the DISPLAY variable will need to be set in Bash. Fortunately, there are many X servers that run on Windows; some of the more popular free ones are Xming, Cygwin X, and vcXsrv.
The article above also contains some more instructions on how to start an X11 server and to test that it works.