启动时报错 qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.

[haujetzhao]

启动时报错 qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.

[forliuyifei]

我之前误操作把 ~ 目录 rm 了，根目录还保留着……应该重装 qt 相关的工具吗？

不，应该与这个无关。

你试试 sudo apt install libxcb-util1 。我是通过这条信息查到的：

Cannot load library /home/forzqx/.local/lib/python3.7/site-packages/PyQt5/Qt/plugins/platforms/libqxcb.so: (libxcb-util.so.1: 无法打开共享对象文件: 没有那个文件或目录)

英语：

Cannot load library /home/forzqx/.local/lib/python3.7/site-packages/PyQt5/Qt/plugins/platforms/libqxcb.so: (libxcb-util.so.1: cannot open shared object file: No such file or directory)"

我参考了：

• [QTBUG-88688] Qt application fails to start on Debian 10 Buster because libqxcb.so requires missing libxcb-util.so.1 - Qt Bug Tracker § comment-543920
• What the heck is libxcb-util.so.1? : linux4noobs

在 pkgs.org 搜索 libxcb-util1 包： Libxcb-util1 Download (DEB, RPM)

非常感谢，确实装了这个就好了👍

[pzhlkj6612]

你好。

假设你是在 Debian 系操作系统上，试试这个：

$ sudo apt install libxcb-xinerama0

参考：

• “Failed to load platform plugin ”xcb“ ” while launching qt5 app on linux without qt installed - Ask Ubuntu
• qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found. | Qt Forum

---

编辑：

安装 libxcb-util1 可解决问题。

$ sudo apt install libxcb-util1

From: #58 (comment)

[forliuyifei]

你好。

假设你是在 Debian 系操作系统上，试试这个：

$ sudo apt install libxcb-xinerama0

参考：

• “Failed to load platform plugin ”xcb“ ” while launching qt5 app on linux without qt installed - Ask Ubuntu
• qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found. | Qt Forum

你好。

假设你是在 Debian 系操作系统上，试试这个：

$ sudo apt install libxcb-xinerama0

参考：

• “Failed to load platform plugin ”xcb“ ” while launching qt5 app on linux without qt installed - Ask Ubuntu
• qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found. | Qt Forum

libxcb-xinerama0 已经是最新版 (1.13.1-2)

但还是跟之前一样的报错。

[pzhlkj6612]

你带上 QT_DEBUG_PLUGINS=1 再启动 QuickCut ，然后把所有的输出都发上来：

$ QT_DEBUG_PLUGINS=1 quickcut

[forliuyifei]

QT_DEBUG_PLUGINS=1 quickcut
QFactoryLoader::QFactoryLoader() checking directory path "/home/forzqx/.local/lib/python3.7/site-packages/PyQt5/Qt/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() looking at "/home/forzqx/.local/lib/python3.7/site-packages/PyQt5/Qt/plugins/platforms/libqeglfs.so"
Found metadata in lib /home/forzqx/.local/lib/python3.7/site-packages/PyQt5/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/forzqx/.local/lib/python3.7/site-packages/PyQt5/Qt/plugins/platforms/libqlinuxfb.so"
Found metadata in lib /home/forzqx/.local/lib/python3.7/site-packages/PyQt5/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/forzqx/.local/lib/python3.7/site-packages/PyQt5/Qt/plugins/platforms/libqminimal.so"
Found metadata in lib /home/forzqx/.local/lib/python3.7/site-packages/PyQt5/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/forzqx/.local/lib/python3.7/site-packages/PyQt5/Qt/plugins/platforms/libqminimalegl.so"
Found metadata in lib /home/forzqx/.local/lib/python3.7/site-packages/PyQt5/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/forzqx/.local/lib/python3.7/site-packages/PyQt5/Qt/plugins/platforms/libqoffscreen.so"
Found metadata in lib /home/forzqx/.local/lib/python3.7/site-packages/PyQt5/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/forzqx/.local/lib/python3.7/site-packages/PyQt5/Qt/plugins/platforms/libqvnc.so"
Found metadata in lib /home/forzqx/.local/lib/python3.7/site-packages/PyQt5/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/forzqx/.local/lib/python3.7/site-packages/PyQt5/Qt/plugins/platforms/libqwayland-egl.so"
Found metadata in lib /home/forzqx/.local/lib/python3.7/site-packages/PyQt5/Qt/plugins/platforms/libqwayland-egl.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "wayland-egl"
        ]
    },
    "archreq": 0,
    "className": "QWaylandEglPlatformIntegrationPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("wayland-egl")
QFactoryLoader::QFactoryLoader() looking at "/home/forzqx/.local/lib/python3.7/site-packages/PyQt5/Qt/plugins/platforms/libqwayland-generic.so"
Found metadata in lib /home/forzqx/.local/lib/python3.7/site-packages/PyQt5/Qt/plugins/platforms/libqwayland-generic.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "wayland"
        ]
    },
    "archreq": 0,
    "className": "QWaylandIntegrationPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("wayland")
QFactoryLoader::QFactoryLoader() looking at "/home/forzqx/.local/lib/python3.7/site-packages/PyQt5/Qt/plugins/platforms/libqwayland-xcomposite-egl.so"
Found metadata in lib /home/forzqx/.local/lib/python3.7/site-packages/PyQt5/Qt/plugins/platforms/libqwayland-xcomposite-egl.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "wayland-xcomposite-egl"
        ]
    },
    "archreq": 0,
    "className": "QWaylandXCompositeEglPlatformIntegrationPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("wayland-xcomposite-egl")
QFactoryLoader::QFactoryLoader() looking at "/home/forzqx/.local/lib/python3.7/site-packages/PyQt5/Qt/plugins/platforms/libqwayland-xcomposite-glx.so"
Found metadata in lib /home/forzqx/.local/lib/python3.7/site-packages/PyQt5/Qt/plugins/platforms/libqwayland-xcomposite-glx.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "wayland-xcomposite-glx"
        ]
    },
    "archreq": 0,
    "className": "QWaylandXCompositeGlxPlatformIntegrationPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("wayland-xcomposite-glx")
QFactoryLoader::QFactoryLoader() looking at "/home/forzqx/.local/lib/python3.7/site-packages/PyQt5/Qt/plugins/platforms/libqwebgl.so"
Found metadata in lib /home/forzqx/.local/lib/python3.7/site-packages/PyQt5/Qt/plugins/platforms/libqwebgl.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "webgl"
        ]
    },
    "archreq": 0,
    "className": "QWebGLIntegrationPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("webgl")
QFactoryLoader::QFactoryLoader() looking at "/home/forzqx/.local/lib/python3.7/site-packages/PyQt5/Qt/plugins/platforms/libqxcb.so"
Found metadata in lib /home/forzqx/.local/lib/python3.7/site-packages/PyQt5/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 "/usr/bin/platforms" ...
Cannot load library /home/forzqx/.local/lib/python3.7/site-packages/PyQt5/Qt/plugins/platforms/libqxcb.so: (libxcb-util.so.1: 无法打开共享对象文件: 没有那个文件或目录)
QLibraryPrivate::loadPlugin failed on "/home/forzqx/.local/lib/python3.7/site-packages/PyQt5/Qt/plugins/platforms/libqxcb.so" : "Cannot load library /home/forzqx/.local/lib/python3.7/site-packages/PyQt5/Qt/plugins/platforms/libqxcb.so: (libxcb-util.so.1: 无法打开共享对象文件: 没有那个文件或目录)"
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, wayland-egl, wayland, wayland-xcomposite-egl, wayland-xcomposite-glx, webgl, xcb.

[1]    32060 abort      QT_DEBUG_PLUGINS=1 quickcut

我之前误操作把 ~ 目录 rm 了，根目录还保留着……应该重装 qt 相关的工具吗？

[pzhlkj6612]

我之前误操作把 ~ 目录 rm 了，根目录还保留着……应该重装 qt 相关的工具吗？

不，应该与这个无关。

---

你试试 sudo apt install libxcb-util1 。我是通过这条信息查到的：

Cannot load library /home/forzqx/.local/lib/python3.7/site-packages/PyQt5/Qt/plugins/platforms/libqxcb.so: (libxcb-util.so.1: 无法打开共享对象文件: 没有那个文件或目录)

英语：

Cannot load library /home/forzqx/.local/lib/python3.7/site-packages/PyQt5/Qt/plugins/platforms/libqxcb.so: (libxcb-util.so.1: cannot open shared object file: No such file or directory)"

我参考了：

• [QTBUG-88688] Qt application fails to start on Debian 10 Buster because libqxcb.so requires missing libxcb-util.so.1 - Qt Bug Tracker § comment-543920
• What the heck is libxcb-util.so.1? : linux4noobs

在 pkgs.org 搜索 libxcb-util1 包： Libxcb-util1 Download (DEB, RPM)