It seems something in the GDK initialization process is wrong.

If I run gtk3-demo.exe from my local workstation everything is working perfectly, if I run it while connected via Remote Desktop the apps crash.

It reminds me somehow of bug #774379 (https://bugzilla.gnome.org/show_bug.cgi?id=774379) where something similar happened when a graphics tablet was connected.

I tried different color depths on the RDP connection but it does not change anything. What I observed is that there is a "Remote Desktop Mouse"-Device in the Device manager (HID subsection) when connected via RDP. It is not there if the RDP connection is not running.

I have a 3D-Connexion space mouse connected if that matters somehow (the driver has an emulation device that will not vanish if I unplug the thing, but it does not change the crashing behaviour either if it's plugged in or not).

If the GTK3 app is started locally and I connect to the workstation by RDP afterwards it does not go down but works as expected, it has to be something in the initialization.