Install unity-settings-daemon by entering the following commands in the terminal:
sudo apt update sudo apt install unity-settings-daemon
Description:
daemon handling the Unity session settings
This package contains the daemon which is responsible for setting the various parameters of a Unity session and the applications that run under it. It handles the following kinds of settings: . * Keyboard: layout, accessibility options, shortcuts, media keys * Clipboard management * Theming: background, icons, GTK+ applications * Cleanup of unused files * Mouse: cursors, speed, accessibility options * Startup of other daemons: screensaver, sound daemon * Typing break . It also sets various application settings through X resources and freedesktop.org XSETTINGS.
Version: 15.04.1+18.04.20180413-0ubuntu1
Section: universe/gnome