Are you talking about the guest screen or the host screen flashing? And are you sure that X11 is running after installing those packages? In a terminal in the guest run "ps -Af | grep X" and see if Xwayland is in the list.
Are you talking about the guest screen or the host screen flashing? And are you sure that X11 is running after installing those packages? In a terminal in the guest run "ps -Af | grep X" and see if Xwayland is in the list.