XFCE Power Manager http://goodies.xfce.org/projects/applications/xfce4-power-manager battery Modify the laptop display brightness Authentication is required to modify the laptop display brightness no no yes /usr/sbin/xfpm-power-backlight-helper Suspend or hibernate the system Authentication is required to place the system in suspend or hibernate mode auth_admin auth_admin yes /usr/sbin/xfce4-pm-helper