http://www.gentoo.ru/node/28532 | Gentoo | XFCE | PolicyKit

  <action id="org.xfce.power.pm-helper">

    <description>Allow the laptop suspend, hibernate</description>
    <message>Authentication is required to suspend, hibernate</message>
    <defaults>
      <allow_any>no</allow_any>
      <allow_inactive>no</allow_inactive>
      <allow_active>yes</allow_active>
    </defaults>
    <annotate key="org.freedesktop.policykit.exec.path">/usr/sbin/xfce4-pm-helper</annotate>
  </action>