在绑定界面卡住时，切换到一个tty窗口，再切回来
gsettings reset-recursively org.gnome.settings-daemon.plugins.media-keys
gsettings reset-recursively org.compiz.integrated
gsettings reset-recursively org.gnome.desktop.wm.keybindings
原文：https://www.cnblogs.com/steinven/p/10292632.html