KDE 5 - Plasma 不断崩溃并且无法重新启动（没有任务栏，无法右键单击桌面）

Question

我遇到了类似这个问题的问题：启动后，我进入一个没有任务栏的桌面，并且桌面对右键单击没有反应。大多数时候krunner都可以工作，所以我可以启动程序（Ctrl+Alt+T也会打开一个终端，将光标移动到左上角显示所有当前窗口，我可以通过快捷方式在虚拟桌面之间切换）。我删除了.config/plasma*，.kde4/甚至创建了一个新用户，但似乎没有任何帮助解决问题。登录时，KDE 正在加载，但启动屏幕在显示桌面之前会在最后挂起几秒钟。奇怪的是，屏幕左下角有一个任务栏的伪影，大约 1px 宽，并且具有任务栏的高度（并且周围还有轻微的“眩光”）。

我尝试手动重新启动它，kstart plasma-shell这给了我 kstart(1597) main: Omitting both --window and --windowclass arguments is not recommended. 预先运行kquitapp plasma-shell只是挂起。

自从从 KDE 4 -> 5 更新以来，我遇到了这个问题。有几次它自行解决，或者我可以通过删除上述文件夹来解决它，但大多数情况下它没有帮助。当它工作时，例如当我通过崩溃将笔记本电脑取出/插入坞站时，该问题会再次出现plasma-shell（它要求我报告，但由于信息太少而拒绝），并且单击重新启动不会出现“不工作。

任何有关如何解决此问题或在哪里查看（journalctl没有错误）的提示将不胜感激。我在 Lenovo T410（Intel HD 显卡）上运行 Arch Linux。

编辑

这里是我可以从 konsole 重新启动 Plasshell 的少数几次之一的控制台输出（以这种方式获得背景图像，但仍然没有任务栏）。最后几行不断重复（每秒几行）

[johannes@XX ~]$ kstart plasmashell
kstart(1934) main: Omitting both --window and --windowclass arguments is not recommended
kscreen: Primary output changed from KScreen::Output(Id: 72 , Name: "HDMI3" ) ( "HDMI3" ) to KScreen::Output(Id: 72 , Name: "HDMI3" ) ( "HDMI3" )
unversioned plugin detected, may result in instability
unversioned plugin detected, may result in instability
unversioned plugin detected, may result in instability
unversioned plugin detected, may result in instability
unversioned plugin detected, may result in instability
unversioned plugin detected, may result in instability
unversioned plugin detected, may result in instability
No metadata file in the package, expected it at: "/usr/share/wallpapers/Colorado_Farm/contents/images//metadata.desktop"
No metadata file in the package, expected it at: "/usr/share/wallpapers/Colorado_Farm/contents/images//metadata.desktop"
No metadata file in the package, expected it at: "/usr/share/wallpapers/Colorado_Farm/contents/images//metadata.desktop"
kscreen: Primary output changed from KScreen::Output(Id: 72 , Name: "HDMI3" ) ( "HDMI3" ) to KScreen::Output(Id: 72 , Name: "HDMI3" ) ( "HDMI3" )
Known plasmoid ids: QHash()
unversioned plugin detected, may result in instability
unversioned plugin detected, may result in instability
unversioned plugin detected, may result in instability
unversioned plugin detected, may result in instability
org.kde.plasma.pulseaudio: Attempting connection to PulseAudio sound daemon
org.kde.plasma.pulseaudio: QHash((263, "Muted")(260, "Index")(261, "Properties")(266, "Name")(267, "Description")(264, "HasVolume")(265, "VolumeWritable")(270, "ActivePortIndex")(268, "CardIndex")(269, "Ports")(258, "PulseObject")(259, "ObjectName")(257, "Index")(262, "Volume"))
org.kde.plasma.pulseaudio: QHash((263, "Muted")(260, "Index")(261, "Properties")(266, "Name")(267, "Description")(264, "HasVolume")(265, "VolumeWritable")(270, "ActivePortIndex")(268, "CardIndex")(269, "Ports")(258, "PulseObject")(259, "ObjectName")(257, "Index")(262, "Volume"))
file:///usr/lib/qt/qml/org/kde/plasma/extras/ScrollArea.qml:48: Error: Cannot assign to non-existent property "interactive"
Notifications service registered
file:///usr/share/plasma/plasmoids/org.kde.plasma.notifications/contents/ui/Notifications.qml:135: TypeError: Cannot read property 'IdleTime' of undefined
XSync seems available and ready
XSync Inited
Supported, init completed
file:///usr/lib/qt/qml/QtQuick/Controls/Button.qml:96: TypeError: Cannot read property of null
file:///usr/lib/qt/qml/QtQuick/Controls/Button.qml:96: TypeError: Cannot read property of null
file:///usr/lib/qt/qml/QtQuick/Controls/Styles/Plasma/ToolButtonStyle.qml:37: TypeError: Cannot read property 'flat' of null
file:///usr/lib/qt/qml/QtQuick/Controls/Styles/Plasma/ToolButtonStyle.qml:38: TypeError: Cannot read property 'hovered' of null
file:///usr/lib/qt/qml/QtQuick/Controls/Styles/Plasma/ToolButtonStyle.qml:124: TypeError: Cannot read property 'text' of null
file:///usr/lib/qt/qml/QtQuick/Controls/Styles/Base/ButtonStyle.qml:83: TypeError: Cannot read property 'menu' of null
file:///usr/lib/qt/qml/QtQuick/Controls/Styles/Plasma/ToolButtonStyle.qml:37: TypeError: Cannot read property 'flat' of null
file:///usr/lib/qt/qml/QtQuick/Controls/Styles/Plasma/ToolButtonStyle.qml:38: TypeError: Cannot read property 'hovered' of null
file:///usr/lib/qt/qml/QtQuick/Controls/Styles/Plasma/ToolButtonStyle.qml:124: TypeError: Cannot read property 'text' of null
file:///usr/lib/qt/qml/QtQuick/Controls/Styles/Base/ButtonStyle.qml:83: TypeError: Cannot read property 'menu' of null
file:///usr/lib/qt/qml/QtQuick/Controls/Styles/Plasma/ToolButtonStyle.qml:37: TypeError: Cannot read property 'flat' of null
file:///usr/lib/qt/qml/QtQuick/Controls/Styles/Plasma/ToolButtonStyle.qml:38: TypeError: Cannot read property 'hovered' of null
file:///usr/lib/qt/qml/QtQuick/Controls/Styles/Plasma/ToolButtonStyle.qml:124: TypeError: Cannot read property 'text' of null
file:///usr/lib/qt/qml/QtQuick/Controls/Styles/Base/ButtonStyle.qml:83: TypeError: Cannot read property 'menu' of null
file:///usr/lib/qt/qml/QtQuick/Controls/Button.qml:96: TypeError: Cannot read property of null
file:///usr/lib/qt/qml/QtQuick/Controls/Button.qml:96: TypeError: Cannot read property of null
file:///usr/lib/qt/qml/QtQuick/Controls/Styles/Plasma/ToolButtonStyle.qml:37: TypeError: Cannot read property 'flat' of null
file:///usr/lib/qt/qml/QtQuick/Controls/Styles/Plasma/ToolButtonStyle.qml:38: TypeError: Cannot read property 'hovered' of null
file:///usr/lib/qt/qml/QtQuick/Controls/Styles/Plasma/ToolButtonStyle.qml:124: TypeError: Cannot read property 'text' of null
file:///usr/lib/qt/qml/QtQuick/Controls/Styles/Base/ButtonStyle.qml:83: TypeError: Cannot read property 'menu' of null
file:///usr/lib/qt/qml/QtQuick/Controls/Styles/Plasma/ToolButtonStyle.qml:37: TypeError: Cannot read property 'flat' of null
file:///usr/lib/qt/qml/QtQuick/Controls/Styles/Plasma/ToolButtonStyle.qml:38: TypeError: Cannot read property 'hovered' of null
file:///usr/lib/qt/qml/QtQuick/Controls/Styles/Plasma/ToolButtonStyle.qml:124: TypeError: Cannot read property 'text' of null
file:///usr/lib/qt/qml/QtQuick/Controls/Styles/Base/ButtonStyle.qml:83: TypeError: Cannot read property 'menu' of null
file:///usr/lib/qt/qml/QtQuick/Controls/Button.qml:96: TypeError: Cannot read property of null
file:///usr/lib/qt/qml/QtQuick/Controls/Button.qml:96: TypeError: Cannot read property of null
file:///usr/lib/qt/qml/QtQuick/Controls/Styles/Plasma/ToolButtonStyle.qml:37: TypeError: Cannot read property 'flat' of null
file:///usr/lib/qt/qml/QtQuick/Controls/Styles/Plasma/ToolButtonStyle.qml:38: TypeError: Cannot read property 'hovered' of null
file:///usr/lib/qt/qml/QtQuick/Controls/Styles/Plasma/ToolButtonStyle.qml:124: TypeError: Cannot read property 'text' of null
file:///usr/lib/qt/qml/QtQuick/Controls/Styles/Base/ButtonStyle.qml:83: TypeError: Cannot read property 'menu' of null
libkcups: Create-Printer-Subscriptions last error: 1025 Forbidden
libkcups: Calling cupsDoAuthentication() password_retries: 0
libkcups: Called cupsDoAuthentication(), success: true
libkcups: Create-Printer-Subscriptions last error: 1025 Forbidden
libkcups: Calling cupsDoAuthentication() password_retries: 0
libkcups: Called cupsDoAuthentication(), success: true

直到大约 15 分钟后，任务栏确实出现了

libkcups: Calling cupsDoAuthentication() password_retries: 0
libkcups: Called cupsDoAuthentication(), success: true
Plasma Shell startup completed

但 libkcups 消息不断出现。

Answer 1

发生这种情况是由于 libkcups 中的错误所致。即使用户没有在 cups 服务器上授予该权限，它也会重试创建打印机订阅，直到无限。

如果您使用本地 cups 服务器，请查看您的cupsd.conf文件。使用 Web 界面将其重置为默认配置可能是个好主意。您可以使用 URL http://localhost:631/admin/，选择“编辑配置文件”，然后选择“使用默认配置文件”。

如果您使用的是远程 cups 服务器，请查看您的client.conf文件。目前，注释掉该文件中的服务器就足以让您的 Plasmashell 恢复活力。如果您想继续将其与 KDE 插件一起使用，则必须联系服务器管理员以授予您必要的权限。

请记住在更改这些文件后重新启动org.cups.cupsd.service守护程序以应用更改。