xfce4-power-manager-settings -V (return code: 1)
xfce4-power-manager-settings: Cannot open display: .
Type 'xfce4-power-manager-settings --help' for usage.
xfce4-power-manager-settings --help (return code: 0)
Usage:
xfce4-power-manager-settings [OPTION?]
Help Options:
-h, --help Show help options
--help-all Show all help options
--help-gtk Show GTK+ Options
Application Options:
-s, --socket-id=SOCKET ID Settings manager socket
-d, --device-id=UpDevice object path Display a specific device by UpDevice object path
--debug Enable debugging
--display=DISPLAY X display to use