When i switch the graphic cards to "DISCRET" (NVIDIA card only) the installation works fine. However with openSUSE Leap 42.3/15.0 BETA the installation in "HYBRID"-mode worked as well. It might be difficult to get logs because when the installer gets stuck there is no way to switch to another console (e.g. Ctrl+Alt+F2). Only Ctrl+Alt+Del will help to restart the machine.