我经历过 KDE 突然停止响应 ALT-TAB（和 CTRL-F1/CTRL-F2）。
我必须重新启动哪个进程才能使其再次运行？
不关闭所有窗口是否可以完成？
我试过：
$ kquitapp5 plasm
"Application plasm could not be found using service org.kde.plasm and path /MainApplication."
$ kquitapp5 plasma-desktop
"Application plasma-desktop could not be found using service org.kde.plasma-desktop and path /MainApplication."
$ kquitapp5 plasmashell
"Application plasmashell could not be found using service org.kde.plasmashell and path /MainApplication."
$ plasmashell --replace &
似乎工作。