I’ve just got a UD-3000 for use with my Samsung laptop running Windows 8.1. Everything is working really well with the laptop open, but there is a problem when I close it.
My power settings are correctly set to do nothing when the laptop is closed - it does not sleep.
I have a single external screen, and my display settings are set to only display on the second display. This works fine with the laptop open - the laptop screen is off and the external display is active.
When I close the laptop, the external screen switches off. When I open it again and look at the display settings, they have been changed to “Duplicate” and both screens are now on, showing the same image. I’ve gone through this cycle several times - I set it to display 2 only, close the lid, and the setting is changed to duplicate.