The WIFI issued is cleared now.  But now the screen brightness control has stopped working.  Neither the keyboard shortcut, control panel or control centre controls make any difference to the screen brightness (autobrightness on or off).  The slider moves from one side to the other, however there is no physical change in the screen.  Its like it is stuck in the middle somewhere.  Neither bright nor dim.

Has anyone else come across this issue?

Im supoosing it is another driver issue.  But I havent seen any dislpay driver updates.