OK, so I have win7 pro 64bit with Nvidia GTX690 335.23 latest nvidia drivers (also tried other older drivers without success.
Three screens working fine in 2d surround.
Connect new 7" Lilliput and install latest 7.4 whatever displaylink drivers.
Initially, when I connected the usb screen, two main monitors turn off. switch off the usb screen and 2d surround works fine and all screens turn back on.
I have managed to get all four screens working, of sorts, but without being able to span the desktop across the three main screens. So when I run iracing, although I have the gfx settings set to run iracing on 3 screens rendered separately, the sim only displays on the center screen, with the outer two and the usb screen all displaying the desktop.
Also, with the usb screen powered ON, the Nvidia control panel is none functional.
When I turn the usb screen off, the Nvidia control panel works as normal.
I cannot operate the nvidia 'span displays with surround' when all four screens are listed, because a pop up appears that requires me to close a program called "Displaylinkuseragent.exe". When I try to close that application in task manager, it fails and says "Access denied". So I have to uninstall the displaylink software to be able to run the nvidia span display routine.
So, I can have four screens all working as clones (but lose all nvidia control panel functions), but I cannot have three main screens with extended desktop 2d surround and the fourth usb screen as accessory monitor.
It seems this is a long-standing issue. Did I just waste £100 on a stupid usb screen?
Please help.
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