我今天将 Debian Testing 更新为 Plasma 版本 4:5.14.5.1，然后尝试待机模式。当我再次启动 PC 时（它似乎已正常关闭），系统托盘图标消失了，使用 Alt+Space 进行搜索仅显示联系人。此外，右键单击小部件时不再显示上下文菜单。我现在无法正常使用 PC，发生了什么？我已经尝试多次重新启动，但一切保持不变。
更新后：
Versions of packages plasma-workspace depends on:
ii dbus-user-session [default-dbus-session-bus] 1.12.16-1
ii dbus-x11 [dbus-session-bus] 1.12.16-1
ii drkonqi 5.14.5-1
ii frameworkintegration 5.62.0-1
ii gdb-minimal [gdb] 8.3-1
ii iso-codes 4.3-1
ii kactivitymanagerd 5.14.5-1
ii kded5 5.62.0-1
ii kinit 5.62.0-1
ii kio 5.62.1-1
ii kpackagetool5 5.62.0-1
ii kwin-common 4:5.14.5-1
ii libappstreamqt2 0.12.9-1
ii libc6 2.29-2
ii libcolorcorrect5 4:5.14.5.1-2
ii libgcc1 1:9.2.1-8
ii libgps23 3.17-7
ii libice6 2:1.0.9-2
ii libkf5activities5 5.62.0-1
ii libkf5authcore5 5.62.0-1
ii libkf5baloo5 5.62.0-2
ii libkf5bookmarks5 5.62.0-1
ii libkf5calendarevents5 5.54.0-1
ii libkf5completion5 5.62.0-1
ii libkf5config-bin 5.62.0-1
ii libkf5configcore5 5.62.0-1
ii libkf5configgui5 5.62.0-1
ii libkf5configwidgets5 5.62.0-1
ii libkf5coreaddons5 5.62.0-1
ii libkf5crash5 5.62.0-1
ii libkf5dbusaddons5 5.62.0-1
ii libkf5declarative5 5.54.0-1
ii libkf5globalaccel-bin 5.62.0-1
ii libkf5globalaccel5 5.62.0-1
ii libkf5guiaddons5 5.62.0-1
ii libkf5holidays5 1:5.62.0-1
ii libkf5i18n5 5.62.0-1
ii libkf5iconthemes5 5.62.0-1
ii libkf5idletime5 5.62.0-1
ii libkf5itemviews5 5.62.0-1
ii libkf5jobwidgets5 5.62.0-1
ii libkf5js5 5.62.0-1
ii libkf5jsembed5 5.62.0-1
ii libkf5kdelibs4support5 5.62.0-1
ii libkf5kiocore5 5.62.1-1
ii libkf5kiofilewidgets5 5.62.1-1
ii libkf5kiogui5 5.62.1-1
ii libkf5kiowidgets5 5.62.1-1
ii libkf5networkmanagerqt6 5.62.0-1
ii libkf5newstuff5 5.62.0-1
ii libkf5notifications5 5.62.0-1
ii libkf5notifyconfig5 5.62.0-1
ii libkf5package5 5.62.0-1
ii libkf5plasma5 5.54.0-1
ii libkf5plasmaquick5 5.54.0-1
ii libkf5prison5 5.62.0-1
ii libkf5quickaddons5 5.54.0-1
ii libkf5runner5 5.54.0-1
ii libkf5service-bin 5.62.0-1
ii libkf5service5 5.62.0-1
ii libkf5solid5 5.62.0-2
ii libkf5texteditor5 5.62.0-1
ii libkf5textwidgets5 5.62.0-1
ii libkf5wallet-bin 5.62.0-1
ii libkf5wallet5 5.62.0-1
ii libkf5waylandclient5 4:5.62.0-2
ii libkf5widgetsaddons5 5.62.0-1
ii libkf5windowsystem5 5.62.0-2
ii libkf5xmlgui5 5.62.0-1
ii libkscreenlocker5 5.14.5-1
ii libksgrd7 4:5.14.5-1
ii libkworkspace5-5 4:5.14.5.1-2
ii libphonon4qt5-4 4:4.10.3-3
ii libplasma-geolocation-interface5 4:5.14.5.1-2
ii libprocesscore7 4:5.14.5-1
ii libprocessui7 4:5.14.5-1
ii libqalculate20 2.8.2-1+b1
ii libqt5core5a 5.11.3+dfsg1-4
ii libqt5dbus5 5.11.3+dfsg1-4
ii libqt5gui5 5.11.3+dfsg1-4
ii libqt5network5 5.11.3+dfsg1-4
ii libqt5qml5 5.11.3-4
ii libqt5quick5 5.11.3-4
ii libqt5sql5 5.11.3+dfsg1-4
ii libqt5widgets5 5.11.3+dfsg1-4
ii libqt5x11extras5 5.11.3-2
ii libqt5xml5 5.11.3+dfsg1-4
ii libsm6 2:1.2.3-1
ii libstdc++6 9.2.1-8
ii libtaskmanager6 4:5.14.5.1-2
ii libweather-ion7 4:5.14.5.1-2
ii libx11-6 2:1.6.8-1
ii libxcb-composite0 1.13.1-2
ii libxcb-damage0 1.13.1-2
ii libxcb-image0 0.4.0-1+b2
ii libxcb-randr0 1.13.1-2
ii libxcb-util0 0.3.8-3+b2
ii libxcb1 1.13.1-2
ii libxfixes3 1:5.0.3-1
ii libxrender1 1:0.9.10-1
ii libxtst6 2:1.2.3-1
ii milou 4:5.14.5-1
ii phonon4qt5 4:4.10.3-3
ii plasma-framework 5.54.0-1
ii plasma-integration 5.14.5-1
ii qdbus-qt5 5.11.3-4
ii qml-module-org-kde-draganddrop 5.54.0-1
ii qml-module-org-kde-kcoreaddons 5.54.0-1
ii qml-module-org-kde-kholidays 1:5.62.0-1
ii qml-module-org-kde-kquickcontrols 5.54.0-1
ii qml-module-org-kde-kquickcontrolsaddons 5.54.0-1
ii qml-module-org-kde-kwindowsystem 5.54.0-1
ii qml-module-org-kde-solid 5.62.0-2
ii qml-module-qt-labs-folderlistmodel 5.11.3-4
ii qml-module-qtgraphicaleffects 5.11.3-2
ii qml-module-qtqml-models2 5.11.3-4
ii qml-module-qtquick-controls 5.11.3-2
ii qml-module-qtquick-dialogs 5.11.3-2
ii qml-module-qtquick-layouts 5.11.3-4
ii qml-module-qtquick-window2 5.11.3-4
ii qml-module-qtquick2 5.11.3-4
ii udisks2 2.8.4-1
ii x11-utils 7.7+4
ii x11-xserver-utils 7.7+8
ii zlib1g 1:1.2.11.dfsg-1+b1
Versions of packages plasma-workspace recommends:
ii kde-cli-tools 4:5.14.5-1
ii kio-extras 4:19.08.1-1
ii ksysguardd 4:5.14.5-1
ii libpam-kwallet5 5.14.5-1
ii powerdevil 4:5.14.5-1
如果您需要更多信息，请随时在评论中询问。
编辑：
我发现了一个不久前发生的案例，其中发生了完全相同的事情：https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=907301
答案1
要结束这个问题：问题是等离子框架中的版本不匹配