Same bug here. The bug is present on both Xubuntu 16.04 and Ubuntu LiveUSB 16.04 (was OK on both Xubuntu/Ubuntu 14.04). Workaround for Xubuntu: Ctrl+Alt+Backspace kills the X server (does not work on Ubuntu).
Trying commands in #4: $ gnome-session-quit --logout ** (gnome-session-quit:25437): WARNING **: Failed to call logout: GDBus.Error:org.gnome.SessionManager.NotInRunning: Logout interface is only available during the Running phase $ dbus-send --session --type=method_call --print-reply --dest=org.gnome.SessionManager /org/gnome/SessionManager org.gnome.SessionManager.Logout uint32:0 Error org.gnome.SessionManager.NotInRunning: Logout interface is only available during the Running phase $ dbus-send --session --type=method_call --print-reply --dest=org.gnome.SessionManager /org/gnome/SessionManager org.gnome.SessionManager.Logout uint32:1 Error org.gnome.SessionManager.NotInRunning: Logout interface is only available during the Running phase I hope it helps, Do not hesitate if you want me to run some more tests, Antoine -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1448418 Title: Logout not working in Cairo Dock To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/cairo-dock/+bug/1448418/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs