For work I connect my laptop directly to a second monitor and choose the "extend screen option" to allow use of two monitors. This works fine until I unhook from the external monitor. Then my laptop screen goes blank and I am unable to use the laptop. Rebooting the laptop does not correct the issue. The fn options to switch between projector modes does not correct the issue. The windows+P option does not correct the issue. The only resolution I have found is to login to my laptop in safe mode and reset the display settign there. I would like to know how to resolve this so I can unplug my external monitor and not have to login via safemode the next time I use my laptop.