"/usr/share/polkit-1/actions/org.xfce.power.policy" is the file name on my lubuntu 15.10 instead of "/usr/share/polkit-1/actions/org.freedesktop.upower.policy"
"/usr/ share/polkit- 1/actions/ org.xfce. power.policy" is the file name on my lubuntu 15.10 instead of "/usr/share/ polkit- 1/actions/ org.freedesktop .upower. policy"