Debian
升級 Debian10->11 後 KDE Plasma 無法啟動（黑屏）
我從 Debian 10 升級到 11。完成升級後——由於磁碟空間不足（應該有足夠的空間）而出現問題，一些 rkhunter config 和 unattended-upgr 阻止 konsole 命令——我重新啟動。
第一個奇怪的是，詢問 grub 密碼的初始啟動螢幕是紅色的，看起來有點奇怪，而不是藍色，但很快又變回了藍色。第二個問題是登錄後我只有一個黑屏（頂部有一些視窗）。這是因為 Plasmashell 沒有執行（唯一執行的是
startplasma-x11）所以我用kstart5 plasmashell. 但是，它似乎在完全載入後立即崩潰（顯示桌面和工作列）。如何解決這個問題？完整的輸出是：Omitting both --window and --windowclass arguments is not recommended kf.coreaddons: Expected JSON property "X-Plasma-ContainmentCategories" to be a string list. Treating it as a list with a single entry: "panel" org.kde.plasma.desktop.defaultPanel kf.coreaddons: Expected JSON property "X-Plasma-ContainmentCategories" to be a string list. Treating it as a list with a single entry: "panel" org.kde.plasma.desktop.appmenubar kf.coreaddons: Expected JSON property "X-Plasma-ContainmentCategories" to be a string list. Treating it as a list with a single entry: "panel" org.kde.plasma.desktop.emptyPanel kf.plasma.quick: Applet preload policy set to 1 Cyclic dependency detected between "file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/kirigami.2/styles/org.kde.desktop.plasma/Units.qml" and "file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/kirigami.2/styles/org.kde.desktop.plasma/Units.qml" qt.svg: <input>:406:376: Could not add child element to parent element because the types are incorrect. qt.svg: <input>:407:130: Could not add child element to parent element because the types are incorrect. qt.svg: <input>:408:130: Could not add child element to parent element because the types are incorrect. qt.svg: <input>:408:393: Could not add child element to parent element because the types are incorrect. qt.svg: <input>:409:130: Could not add child element to parent element because the types are incorrect. qt.svg: <input>:410:129: Could not add child element to parent element because the types are incorrect. qt.svg: <input>:411:129: Could not add child element to parent element because the types are incorrect. qt.svg: <input>:412:129: Could not add child element to parent element because the types are incorrect. qt.svg: <input>:413:129: Could not add child element to parent element because the types are incorrect. qt.svg: <input>:413:379: Could not add child element to parent element because the types are incorrect. qt.svg: <input>:413:631: Could not add child element to parent element because the types are incorrect. trying to show an empty dialog file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/views/Desktop.qml:146:19: QML Loader: Binding loop detected for property "height" file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/views/Desktop.qml:146:19: QML Loader: Binding loop detected for property "height" trying to show an empty dialog file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/views/Desktop.qml:146:19: QML Loader: Binding loop detected for property "height" file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/views/Desktop.qml:146:19: QML Loader: Binding loop detected for property "height" libpng warning: iCCP: known incorrect sRGB profile kf.coreaddons: KDirWatch: "/usr/share/desktop-base/homeworld-theme/wallpaper" is a directory. Use addDir! kf.coreaddons: KDirWatch: "/usr/share/desktop-base/futureprototype-theme/wallpaper" is a directory. Use addDir! kf.coreaddons: KDirWatch: "/usr/share/desktop-base/futureprototype-theme/wallpaper-withlogo" is a directory. Use addDir! kf.coreaddons: KDirWatch: "/usr/share/desktop-base/joy-theme/wallpaper" is a directory. Use addDir! kf.coreaddons: KDirWatch: "/usr/share/desktop-base/joy-inksplat-theme/wallpaper" is a directory. Use addDir! kf.coreaddons: KDirWatch: "/usr/share/desktop-base/joy-theme/lockscreen" is a directory. Use addDir! kf.coreaddons: KDirWatch: "/usr/share/desktop-base/lines-theme/wallpaper" is a directory. Use addDir! kf.coreaddons: KDirWatch: "/usr/share/desktop-base/lines-theme/lockscreen" is a directory. Use addDir! kf.coreaddons: KDirWatch: "/usr/share/desktop-base/moonlight-theme/wallpaper" is a directory. Use addDir! kf.coreaddons: KDirWatch: "/usr/share/desktop-base/moonlight-theme/lockscreen" is a directory. Use addDir! kf.coreaddons: KDirWatch: "/usr/share/wallpapers/Next" is a directory. Use addDir! kf.coreaddons: KDirWatch: "/usr/share/desktop-base/softwaves-theme/wallpaper" is a directory. Use addDir! kf.coreaddons: KDirWatch: "/usr/share/desktop-base/softwaves-theme/lockscreen" is a directory. Use addDir! kf.coreaddons: KDirWatch: "/usr/share/desktop-base/spacefun-theme/wallpaper" is a directory. Use addDir! libpng warning: iCCP: known incorrect sRGB profile Plasma Shell startup completed qml: disabling redshift qml: renderModeString: qml: disabling redshift qml: onLoaded Connecting to deprecated signal QDBusConnectionInterface::serviceOwnerChanged(QString,QString,QString) file:///usr/share/plasma/plasmoids/org.kde.panel/contents/ui/main.qml:30:1: QML DropArea (parent or ancestor of QQuickLayoutAttached): Binding loop detected for property "minimumWidth" Both point size and pixel size set. Using pixel size. Both point size and pixel size set. Using pixel size. Both point size and pixel size set. Using pixel size. trying to show an empty dialog trying to show an empty dialog trying to show an empty dialog Cyclic dependency detected between "file:///usr/share/plasma/plasmoids/org.kde.plasma.notifications/contents/ui/global/Globals.qml" and "file:///usr/share/plasma/plasmoids/org.kde.plasma.notifications/contents/ui/NotificationHeader.qml" file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/plasma/extras/PlasmoidHeading.qml:56:5: Unable to assign [undefined] to int Plasma Shell startup completed Plasma Shell startup completed trying to show an empty dialog file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/views/Desktop.qml:146:19: QML Loader: Binding loop detected for property "height" file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/views/Desktop.qml:146:19: QML Loader: Binding loop detected for property "height" KAStatsFavoritesModel::setFavorites is ignored Entry is not valid "applications:seahorse.desktop" QSharedPointer(0x563b9bdb07d0) Entry is not valid "applications:seahorse.desktop" QSharedPointer(0x563b9bd267e0) file:///usr/share/plasma/plasmoids/org.kde.plasma.kickoff/contents/ui/FullRepresentation.qml:356: ReferenceError: headerSeparator is not defined trying to show an empty dialog qml: clearing connected sources, stop source was: killall redshift; redshift -x qml: enabling redshift with command: redshift [...] libpng warning: iCCP: known incorrect sRGB profile libpng warning: known incorrect sRGB profile libpng warning: profile matches sRGB but writing iCCP instead file:///home/username/.local/share/plasma/plasmoids/org.kde.plasma.eventcalendar/contents/ui/TimerView.qml:31:13: QML ToolButton: Detected anchors on an item that is managed by a layout. This is undefined behavior; use Layout.alignment instead. file:///home/username/.local/share/plasma/plasmoids/org.kde.plasma.eventcalendar/contents/ui/TimerView.qml:87:13: QML ColumnLayout: Detected anchors on an item that is managed by a layout. This is undefined behavior; use Layout.alignment instead.
解決方案是刪除（或移動）
/home/username/.local/share/plasma/plasmoids/org.kde.plasma.eventcalendar/文件夾（例如通過執行dolphin ~/.local/share/plasma/plasmoids/）並創建一個錯誤報告（我很快就會這樣做）。然後可以用kstart5 plasmashell.