Tim:
It sounds like you have a graphics problem that may crash whatever display program you're using. You probably have to resolve the graphics support, first.
jeandet:
Yes, for now, I would say that it crashes more when I have no mouse+keyboard connected. So for now it seems to work with a keyboard and a mouse connected.
In that case, as a simple test, I'd try using Xorg instead of Wayland. That *may* narrow it down to a Wayland or the particular graphic chipsets driver problem.
Depending on what you've installed, it's available as a login option *between* entering your username and password.
If you've set up an auto-login, you should still be able to do that by manually logging out, and manually logging in making the selection. Your next boot-up and auto-login ought to use the settings you just made.