This is so strange. I have never experienced anything like it. The internal screen becomes useless after test installation of Win 11. And remains useless after rollback to Win 10. The machine works fine with an external screen as primary screen and in duplicate mode the internal screen also shows the same information. But it is completely useless as primary screen. I have written a technical report on this but don´t seem to be able to enclose a PDF. Only remedy seem to be to re-format the SSD outside the machine since all efforts involving a functional internal primary screen seem to fail.
//KEA
