QT6: "qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" 即使找到了。"
QT6: "qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found."
我知道有很多关于这个主题的答案，但是 none 其中对我有帮助。我通过 Oracle VM Virtual Box 使用 Ubunty 20.04，我遇到了与其他人完全相同的错误。
使用官方 Qt 手册构建 Qt6 源代码后，我正在尝试 运行 不同的项目来测试是否一切正常。控制台类型的项目构建和 运行 正确。没有错误。不幸的是，当我尝试 运行 Widget 类型的应用程序时，它因众所周知的错误而失败。
t.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.
我的同事在他的 Ubuntu 上安装了 Qt6，他看到我在 .../qtbase/plugins/platforms[= 中没有 libqxcb.so 32=] 并与我分享。不幸的是，它没有太大帮助。只是错误信息有点变化：它说找到了插件，但无法使用。
我尝试了来自 Internet 的不同解决方案，但其中 none 有帮助。最受欢迎之一
sudo apt install libxcb-icccm4 libxcb-image0 libxcb-keysyms1 libxcb-render-util0
没有影响。
此外，环境变量 QT_DEBUG_PLUGINS=1:
的输出更详细
QFactoryLoader::QFactoryLoader() checking directory path "/home/curiouspan/qt6-build/qtbase/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() looking at "/home/curiouspan/qt6-build/qtbase/plugins/platforms/libqeglfs.so"
Found metadata in lib /home/curiouspan/qt6-build/qtbase/plugins/platforms/libqeglfs.so, metadata=
{
"IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
"MetaData": {
"Keys": [
"eglfs"
]
},
"archreq": 1,
"className": "QEglFSIntegrationPlugin",
"debug": true,
"version": 393728
}
Got keys from plugin meta data QList("eglfs")
QFactoryLoader::QFactoryLoader() looking at "/home/curiouspan/qt6-build/qtbase/plugins/platforms/libqlinuxfb.so"
Found metadata in lib /home/curiouspan/qt6-build/qtbase/plugins/platforms/libqlinuxfb.so, metadata=
{
"IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
"MetaData": {
"Keys": [
"linuxfb"
]
},
"archreq": 1,
"className": "QLinuxFbIntegrationPlugin",
"debug": true,
"version": 393728
}
Got keys from plugin meta data QList("linuxfb")
QFactoryLoader::QFactoryLoader() looking at "/home/curiouspan/qt6-build/qtbase/plugins/platforms/libqminimal.so"
Found metadata in lib /home/curiouspan/qt6-build/qtbase/plugins/platforms/libqminimal.so, metadata=
{
"IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
"MetaData": {
"Keys": [
"minimal"
]
},
"archreq": 1,
"className": "QMinimalIntegrationPlugin",
"debug": true,
"version": 393728
}
Got keys from plugin meta data QList("minimal")
QFactoryLoader::QFactoryLoader() looking at "/home/curiouspan/qt6-build/qtbase/plugins/platforms/libqminimalegl.so"
Found metadata in lib /home/curiouspan/qt6-build/qtbase/plugins/platforms/libqminimalegl.so, metadata=
{
"IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
"MetaData": {
"Keys": [
"minimalegl"
]
},
"archreq": 1,
"className": "QMinimalEglIntegrationPlugin",
"debug": true,
"version": 393728
}
Got keys from plugin meta data QList("minimalegl")
QFactoryLoader::QFactoryLoader() looking at "/home/curiouspan/qt6-build/qtbase/plugins/platforms/libqoffscreen.so"
Found metadata in lib /home/curiouspan/qt6-build/qtbase/plugins/platforms/libqoffscreen.so, metadata=
{
"IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
"MetaData": {
"Keys": [
"offscreen"
]
},
"archreq": 1,
"className": "QOffscreenIntegrationPlugin",
"debug": true,
"version": 393728
}
Got keys from plugin meta data QList("offscreen")
QFactoryLoader::QFactoryLoader() looking at "/home/curiouspan/qt6-build/qtbase/plugins/platforms/libqvnc.so"
Found metadata in lib /home/curiouspan/qt6-build/qtbase/plugins/platforms/libqvnc.so, metadata=
{
"IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
"MetaData": {
"Keys": [
"vnc"
]
},
"archreq": 1,
"className": "QVncIntegrationPlugin",
"debug": true,
"version": 393728
}
Got keys from plugin meta data QList("vnc")
QFactoryLoader::QFactoryLoader() looking at "/home/curiouspan/qt6-build/qtbase/plugins/platforms/libqxcb.so"
Found metadata in lib /home/curiouspan/qt6-build/qtbase/plugins/platforms/libqxcb.so, metadata=
{
"IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
"MetaData": {
"Keys": [
"xcb"
]
},
"archreq": 0,
"className": "QXcbIntegrationPlugin",
"debug": false,
"version": 393728
}
Got keys from plugin meta data QList("xcb")
QFactoryLoader::QFactoryLoader() checking directory path "/home/curiouspan/QtTestProjects/build-WidgetTestApp-Own_Desktop-Debug/platforms" ...
Cannot load library /home/curiouspan/qt6-build/qtbase/plugins/platforms/libqxcb.so: (libQt6XcbQpa.so.6: cannot open shared object file: No such file or directory)
QLibraryPrivate::loadPlugin failed on "/home/curiouspan/qt6-build/qtbase/plugins/platforms/libqxcb.so" : "Cannot load library /home/curiouspan/qt6-build/qtbase/plugins/platforms/libqxcb.so: (libQt6XcbQpa.so.6: 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.
显示 libQt6XcbQpa.so.6 文件丢失。
在 运行ning ldd /home/curiouspan/qt6-build/qtbase/plugins/platforms/libqxcb.so 显示依赖关系后，我得到以下输出：
linux-vdso.so.1 (0x00007fffc8770000)
libQt6XcbQpa.so.6 => not found
libQt6Gui.so.6 => /home/curiouspan/qt6-build/qtbase/plugins/platforms/../../lib/libQt6Gui.so.6 (0x00007f0873306000)
libQt6Core.so.6 => /home/curiouspan/qt6-build/qtbase/plugins/platforms/../../lib/libQt6Core.so.6 (0x00007f087295d000)
libstdc++.so.6 => /lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007f087277c000)
libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f087258a000)
libEGL.so.1 => /lib/x86_64-linux-gnu/libEGL.so.1 (0x00007f0872573000)
libX11.so.6 => /lib/x86_64-linux-gnu/libX11.so.6 (0x00007f0872436000)
libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f0872430000)
libQt6DBus.so.6 => /home/curiouspan/qt6-build/qtbase/plugins/platforms/../../lib/libQt6DBus.so.6 (0x00007f0872262000)
libGLX.so.0 => /lib/x86_64-linux-gnu/libGLX.so.0 (0x00007f087222e000)
libOpenGL.so.0 => /lib/x86_64-linux-gnu/libOpenGL.so.0 (0x00007f0872202000)
所以这个文件真的不见了。
潜在问题是什么？我该如何解决？提前致谢！
感谢所有试图帮助解决我的问题的人。答案来自官方 Qt 论坛。 Link 解决方案：https://forum.qt.io/topic/127696/qt-qpa-plugin-could-not-load-the-qt-platform-plugin-xcb-in-even-though-it-was-found/22
基本上，问题是缺少一些依赖项。由于 Qt6 的特殊性，我不得不安装 Qt5 构建手册中的依赖项。很难说缺少哪个依赖项导致了问题，但是在安装所有依赖项并重新配置和重建源代码之后，项目构建正常。
我在控制台
中通过运行这个命令解决了这个问题
sudo apt install libxcb-xinerama0
原linkhere
全新安装QT Creator后，我遇到了同样的问题。
我通过安装 libxcb-xinerama0
解决了它
sudo apt 安装 libxcb-xinerama0
我知道有很多关于这个主题的答案，但是 none 其中对我有帮助。我通过 Oracle VM Virtual Box 使用 Ubunty 20.04，我遇到了与其他人完全相同的错误。 使用官方 Qt 手册构建 Qt6 源代码后，我正在尝试 运行 不同的项目来测试是否一切正常。控制台类型的项目构建和 运行 正确。没有错误。不幸的是，当我尝试 运行 Widget 类型的应用程序时，它因众所周知的错误而失败。
t.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.
我的同事在他的 Ubuntu 上安装了 Qt6，他看到我在 .../qtbase/plugins/platforms[= 中没有 libqxcb.so 32=] 并与我分享。不幸的是，它没有太大帮助。只是错误信息有点变化：它说找到了插件，但无法使用。
我尝试了来自 Internet 的不同解决方案，但其中 none 有帮助。最受欢迎之一
sudo apt install libxcb-icccm4 libxcb-image0 libxcb-keysyms1 libxcb-render-util0
没有影响。
此外，环境变量 QT_DEBUG_PLUGINS=1:
QFactoryLoader::QFactoryLoader() checking directory path "/home/curiouspan/qt6-build/qtbase/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() looking at "/home/curiouspan/qt6-build/qtbase/plugins/platforms/libqeglfs.so"
Found metadata in lib /home/curiouspan/qt6-build/qtbase/plugins/platforms/libqeglfs.so, metadata=
{
"IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
"MetaData": {
"Keys": [
"eglfs"
]
},
"archreq": 1,
"className": "QEglFSIntegrationPlugin",
"debug": true,
"version": 393728
}
Got keys from plugin meta data QList("eglfs")
QFactoryLoader::QFactoryLoader() looking at "/home/curiouspan/qt6-build/qtbase/plugins/platforms/libqlinuxfb.so"
Found metadata in lib /home/curiouspan/qt6-build/qtbase/plugins/platforms/libqlinuxfb.so, metadata=
{
"IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
"MetaData": {
"Keys": [
"linuxfb"
]
},
"archreq": 1,
"className": "QLinuxFbIntegrationPlugin",
"debug": true,
"version": 393728
}
Got keys from plugin meta data QList("linuxfb")
QFactoryLoader::QFactoryLoader() looking at "/home/curiouspan/qt6-build/qtbase/plugins/platforms/libqminimal.so"
Found metadata in lib /home/curiouspan/qt6-build/qtbase/plugins/platforms/libqminimal.so, metadata=
{
"IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
"MetaData": {
"Keys": [
"minimal"
]
},
"archreq": 1,
"className": "QMinimalIntegrationPlugin",
"debug": true,
"version": 393728
}
Got keys from plugin meta data QList("minimal")
QFactoryLoader::QFactoryLoader() looking at "/home/curiouspan/qt6-build/qtbase/plugins/platforms/libqminimalegl.so"
Found metadata in lib /home/curiouspan/qt6-build/qtbase/plugins/platforms/libqminimalegl.so, metadata=
{
"IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
"MetaData": {
"Keys": [
"minimalegl"
]
},
"archreq": 1,
"className": "QMinimalEglIntegrationPlugin",
"debug": true,
"version": 393728
}
Got keys from plugin meta data QList("minimalegl")
QFactoryLoader::QFactoryLoader() looking at "/home/curiouspan/qt6-build/qtbase/plugins/platforms/libqoffscreen.so"
Found metadata in lib /home/curiouspan/qt6-build/qtbase/plugins/platforms/libqoffscreen.so, metadata=
{
"IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
"MetaData": {
"Keys": [
"offscreen"
]
},
"archreq": 1,
"className": "QOffscreenIntegrationPlugin",
"debug": true,
"version": 393728
}
Got keys from plugin meta data QList("offscreen")
QFactoryLoader::QFactoryLoader() looking at "/home/curiouspan/qt6-build/qtbase/plugins/platforms/libqvnc.so"
Found metadata in lib /home/curiouspan/qt6-build/qtbase/plugins/platforms/libqvnc.so, metadata=
{
"IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
"MetaData": {
"Keys": [
"vnc"
]
},
"archreq": 1,
"className": "QVncIntegrationPlugin",
"debug": true,
"version": 393728
}
Got keys from plugin meta data QList("vnc")
QFactoryLoader::QFactoryLoader() looking at "/home/curiouspan/qt6-build/qtbase/plugins/platforms/libqxcb.so"
Found metadata in lib /home/curiouspan/qt6-build/qtbase/plugins/platforms/libqxcb.so, metadata=
{
"IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
"MetaData": {
"Keys": [
"xcb"
]
},
"archreq": 0,
"className": "QXcbIntegrationPlugin",
"debug": false,
"version": 393728
}
Got keys from plugin meta data QList("xcb")
QFactoryLoader::QFactoryLoader() checking directory path "/home/curiouspan/QtTestProjects/build-WidgetTestApp-Own_Desktop-Debug/platforms" ...
Cannot load library /home/curiouspan/qt6-build/qtbase/plugins/platforms/libqxcb.so: (libQt6XcbQpa.so.6: cannot open shared object file: No such file or directory)
QLibraryPrivate::loadPlugin failed on "/home/curiouspan/qt6-build/qtbase/plugins/platforms/libqxcb.so" : "Cannot load library /home/curiouspan/qt6-build/qtbase/plugins/platforms/libqxcb.so: (libQt6XcbQpa.so.6: 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.
显示 libQt6XcbQpa.so.6 文件丢失。
在 运行ning ldd /home/curiouspan/qt6-build/qtbase/plugins/platforms/libqxcb.so 显示依赖关系后，我得到以下输出：
linux-vdso.so.1 (0x00007fffc8770000)
libQt6XcbQpa.so.6 => not found
libQt6Gui.so.6 => /home/curiouspan/qt6-build/qtbase/plugins/platforms/../../lib/libQt6Gui.so.6 (0x00007f0873306000)
libQt6Core.so.6 => /home/curiouspan/qt6-build/qtbase/plugins/platforms/../../lib/libQt6Core.so.6 (0x00007f087295d000)
libstdc++.so.6 => /lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007f087277c000)
libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f087258a000)
libEGL.so.1 => /lib/x86_64-linux-gnu/libEGL.so.1 (0x00007f0872573000)
libX11.so.6 => /lib/x86_64-linux-gnu/libX11.so.6 (0x00007f0872436000)
libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f0872430000)
libQt6DBus.so.6 => /home/curiouspan/qt6-build/qtbase/plugins/platforms/../../lib/libQt6DBus.so.6 (0x00007f0872262000)
libGLX.so.0 => /lib/x86_64-linux-gnu/libGLX.so.0 (0x00007f087222e000)
libOpenGL.so.0 => /lib/x86_64-linux-gnu/libOpenGL.so.0 (0x00007f0872202000)
所以这个文件真的不见了。 潜在问题是什么？我该如何解决？提前致谢！
感谢所有试图帮助解决我的问题的人。答案来自官方 Qt 论坛。 Link 解决方案：https://forum.qt.io/topic/127696/qt-qpa-plugin-could-not-load-the-qt-platform-plugin-xcb-in-even-though-it-was-found/22
基本上，问题是缺少一些依赖项。由于 Qt6 的特殊性，我不得不安装 Qt5 构建手册中的依赖项。很难说缺少哪个依赖项导致了问题，但是在安装所有依赖项并重新配置和重建源代码之后，项目构建正常。
我在控制台
中通过运行这个命令解决了这个问题sudo apt install libxcb-xinerama0
原linkhere
全新安装QT Creator后，我遇到了同样的问题。 我通过安装 libxcb-xinerama0
解决了它sudo apt 安装 libxcb-xinerama0