Sorry I misunderstood the problem: you do not have to remove Cairo-Dock's "Logout" applet but you've to delay the launching of the dock, e.g. by adding X-GNOME-Autostart-Delay=5 (or more than 5 seconds) in this file: ~/.config/autostart/cairo-dock.desktop
Sorry I misunderstood the problem: you do not have to remove Cairo-Dock's "Logout" applet but you've to delay the launching of the dock, e.g. by adding X-GNOME- Autostart- Delay=5 (or more than 5 seconds) in this file: ~/.config/ autostart/ cairo-dock. desktop