Public bug reported:
I recently installed keepassxc and attempted to launch it both from the
activities menu and from the command line without success. When I try
to run the application from the command line I see:
$ keepassxc --help
This application failed to start because it could not find or load the Qt
platform plugin "xcb"
in "".
Available platform plugins are: eglfs, linuxfb, minimal, minimalegl,
offscreen, vnc, wayland-egl, wayland, wayland-xcomposite-egl, wayland-
xcomposite-glx, xcb.
Reinstalling the application may fix this problem.
Aborted
Trying to find what is wrong with the xcb plugin I ran again with
QT_DEBUG_PLUGINS sete to 1.
$ QT_DEBUG_PLUGINS=1 keepassxc --help
QFactoryLoader::QFactoryLoader() checking directory path "/usr/bin/platforms"
...
QFactoryLoader::QFactoryLoader() looking at "/usr/bin/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"
]
},
"className": "QEglFSIntegrationPlugin",
"debug": false,
"version": 329989
}
Got keys from plugin meta data ("eglfs")
QFactoryLoader::QFactoryLoader() looking at "/usr/bin/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"
]
},
"className": "QLinuxFbIntegrationPlugin",
"debug": false,
"version": 329989
}
Got keys from plugin meta data ("linuxfb")
QFactoryLoader::QFactoryLoader() looking at "/usr/bin/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"
]
},
"className": "QMinimalIntegrationPlugin",
"debug": false,
"version": 329989
}
Got keys from plugin meta data ("minimal")
QFactoryLoader::QFactoryLoader() looking at
"/usr/bin/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"
]
},
"className": "QMinimalEglIntegrationPlugin",
"debug": false,
"version": 329989
}
Got keys from plugin meta data ("minimalegl")
QFactoryLoader::QFactoryLoader() looking at
"/usr/bin/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"
]
},
"className": "QOffscreenIntegrationPlugin",
"debug": false,
"version": 329989
}
Got keys from plugin meta data ("offscreen")
QFactoryLoader::QFactoryLoader() looking at "/usr/bin/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"
]
},
"className": "QVncIntegrationPlugin",
"debug": false,
"version": 329989
}
Got keys from plugin meta data ("vnc")
QFactoryLoader::QFactoryLoader() looking at
"/usr/bin/platforms/libqwayland-egl.so"
Found metadata in lib
/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqwayland-egl.so, metadata=
{
"IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
"MetaData": {
"Keys": [
"wayland-egl"
]
},
"className": "QWaylandEglPlatformIntegrationPlugin",
"debug": false,
"version": 329989
}
Got keys from plugin meta data ("wayland-egl")
QFactoryLoader::QFactoryLoader() looking at
"/usr/bin/platforms/libqwayland-generic.so"
Found metadata in lib
/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqwayland-generic.so,
metadata=
{
"IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
"MetaData": {
"Keys": [
"wayland"
]
},
"className": "QWaylandIntegrationPlugin",
"debug": false,
"version": 329989
}
Got keys from plugin meta data ("wayland")
QFactoryLoader::QFactoryLoader() looking at
"/usr/bin/platforms/libqwayland-xcomposite-egl.so"
Found metadata in lib
/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqwayland-xcomposite-egl.so,
metadata=
{
"IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
"MetaData": {
"Keys": [
"wayland-xcomposite-egl"
]
},
"className": "QWaylandXCompositeEglPlatformIntegrationPlugin",
"debug": false,
"version": 329989
}
Got keys from plugin meta data ("wayland-xcomposite-egl")
QFactoryLoader::QFactoryLoader() looking at
"/usr/bin/platforms/libqwayland-xcomposite-glx.so"
Found metadata in lib
/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqwayland-xcomposite-glx.so,
metadata=
{
"IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
"MetaData": {
"Keys": [
"wayland-xcomposite-glx"
]
},
"className": "QWaylandXCompositeGlxPlatformIntegrationPlugin",
"debug": false,
"version": 329989
}
Got keys from plugin meta data ("wayland-xcomposite-glx")
QFactoryLoader::QFactoryLoader() looking at "/usr/bin/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"
]
},
"className": "QXcbIntegrationPlugin",
"debug": false,
"version": 329989
}
Got keys from plugin meta data ("xcb")
Cannot load library /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so:
(/usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5: symbol
_ZNK15QPlatformWindow15safeAreaMarginsEv version Qt_5_PRIVATE_API not defined
in file libQt5Gui.so.5 with link time reference)
QLibraryPrivate::loadPlugin failed on
"/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so" : "Cannot load
library /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so:
(/usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5: symbol
_ZNK15QPlatformWindow15safeAreaMarginsEv version Qt_5_PRIVATE_API not defined
in file libQt5Gui.so.5 with link time reference)"
This application failed to start because it could not find or load the Qt
platform plugin "xcb"
in "".
Available platform plugins are: eglfs, linuxfb, minimal, minimalegl,
offscreen, vnc, wayland-egl, wayland, wayland-xcomposite-egl, wayland-
xcomposite-glx, xcb.
Reinstalling the application may fix this problem.
Aborted
The final part of the message seems to be the most relevant to my issue.
I am not very familiar with Qt development. Some searching suggests I
have a mismatch between the Qt on my machine and that which the package
needs? Would this be a packaging problem or am I likely to have broken
something long ago while compiling a Qt application?
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: keepassxc 2.3.1+dfsg.1-1
ProcVersionSignature: Ubuntu 4.15.0-43.46-generic 4.15.18
Uname: Linux 4.15.0-43-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.5
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Mon Jan 7 09:00:09 2019
InstallationDate: Installed on 2017-11-16 (416 days ago)
InstallationMedia: Ubuntu 16.04.3 LTS "Xenial Xerus" - Release amd64 (20170801)
SourcePackage: keepassxc
UpgradeStatus: Upgraded to bionic on 2018-07-27 (163 days ago)
** Affects: keepassxc (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug bionic
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https://bugs.launchpad.net/bugs/1810743
Title:
keepassxc fails to start with could not find or load the Qt platform
plugin "xcb" in "".
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