Problem logging in in X-Window.

Dear All,

I have a weird situation.
I have the latest Kali, encrypted disk and everything works fine until recently.
When I start my Laptop, it starts automaticly the X-Window and asks for my user/pass.
What ever user/pass combination I use, it looks like it is going to login but throws me off and have to enter my user/pass again. I simply can not login into my X Enviroment.

So, I've tried to login in a normal terminal, that had no problems.

Any idea how to solve this?

Thanks for your help.