setup: LEAP 42.1 with latest updates running GNOME. Laptop sitting in a docking
station to which an external monitor connected via DVI. After installation of
LEAP, the "GNOME logon screen" is shown on the laptop monitor and the external
one is a display extension positioned to the right side of the laptop monitor.
After logon the display settings are now changed to:
- disable laptop monitor
- make external monitor the primary display
So now the GNOME desktop is only shown on the external monitor, because this is
the screen I'm using (laptop lid is open, but I do not use the display). 

issue 1: when logging of, the password prompt is suddenly shown on the laptop
monitor again - although the display has been disabled. 

expected result: when laptop display is disabled within the GNOME session I
expect that gdm is following this policy as well. (FYI, Windows does it this
way for years already).

issue 2: when undocking (while primary display is the external monitor and the
laptop monitor is disabled), there is no automatic switch over to the laptop
monitor - it stays dark. It is necessary to navigate to a console, issue init 3
and then init 5 again. This is a major bummer, as applications are closed (e.g.
Windows 7 VM on virtualbox). 

expected result 1: when laptop is undocked, the laptop monitor is enabled
again.
expected result 2: when laptop is docked in, the laptop monitor is disabled
again and the primary display is the external monitor. (Needless to say, that
those things work with Windows for years already).