OK, I got the problem again. So your commands give me: xfce4-power-manager --quit (no output message) xfce4-power-manager --no-daemon "Energieverwaltung für Xfce: Eine andere Energieverwaltung läuft bereits" which means translatet: "power manager for fxce: an other power manager is now running".
and in fact, as I looked in my task-manager, there was still an instance of xfce4-power-manager running. After killing that instance, xfce4-power-manager --no-daemon gave me the output: "(xfce4-power-manager:2226): xfce4-power-manager-WARNING **: could not map keysym 1008ffa8 to keycode" but in fact, the power manager is now running and working. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/973778 Title: Unable to connect to Xfce Power Manager To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xfce4-power-manager/+bug/973778/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs