Ryonna, Yes I want only the two DL displays active. Using the switch or not using it doesn’t seem to make a difference. Even with the 3rd monitor not physically connected to the Windows 11 desktop it still shows as an option and is the #1 monitor. That’s a problem because most programs display their screens on the #1 monitor (which in this case isn’t connected to the computer!).
It appears that this could be a phantom display issue. Windows thinks there is an external monitor active which it is opening those applications to, but to the user, it looks like nothing is occurring.
To try to fix this, we need to open up the Windows display settings, and disconnect the phantom display. However, the settings app is likely opening on the phantom display, so you can’t open up their display settings.
To get around this, you can try pressing the “Windows Key” + D, then pressing it again to try to get the windows to appear on main screen though.
I’ve tried “disconnecting” the display in the Sysem >Display screen but it continues to show the device even when I reboot and there’s no physical connection to it. However my UD3900 screens do show up after a reboot and I can login.
The only thing I’ve noticed is that if I disable the display adapter, then the phantom monitor will disappear. The UHD Graphics 770 display adapter seems to take priority except when I disable it in the Device Manager.