Comment 59 for bug 973778

Note that Darko's Bug #1254881 (xfce session starts multiple instances of xfce4-power-manager and xfce4-volumed) is useful, while Bug #1314782 (multimedia keys don't work when xfce4-volumed is run in daemon mode) might be the ultimate fix for all of this, assuming that patch can be applied to more than just xfce4-volumed.