I also looked into IOregistryExplorer and see that the connect type is 00400000 there for FB@1 I tried to patch it via setup.plist but it seems that there is no change in IOregistryExplorer. Though the Hackintool sees the change (image attached)
Im having similar issue with my HS setup, dell latitute 3480, i5-7200U
Once the hdmi plugged in, the laptop display went blank, only could see the external tv
But, when i put my laptop to sleep & wake up again, both screen got display (hdmi still connected)
Even the hdmi could be plugged off & in (after sleep), the laptop display is fine
What could be the culprit?
Dell’s MacBook Pro IORegistry.zip