/usr/share/ubuntu-system-adjustments/sound/silent.oga /usr/share/sounds/freedesktop/stereo/device-added.oga
/usr/share/ubuntu-system-adjustments/sound/silent.oga /usr/share/sounds/freedesktop/stereo/device-removed.oga
usr/share/ubuntu-system-adjustments/menus/mate-keyboard.desktop /usr/share/applications/mate-keyboard.desktop