Some more observations: Using lightdm again and booting on the dock I can get to the login by left or right mouse button or just by undocking. When I put the laptop back on the dock the system freezes (reproduceable).
Some more observations:
Using lightdm again and booting on the dock I can get to the login by left or right mouse button or just by undocking. When I put the laptop back on the dock the system freezes (reproduceable).