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This is running 12.04 on a Mid 2010 with Nvidia GeForce 320M and a USB to DVI displaylink adapter.

I looks like it is almost working, does anyone know why it is turning grey?

Here is a video of what happens : youtu.be/wEgFKzgoFrE

Here is my /usr/share/X11/xorg.conf.d/52-displaylink.conf : http://pastebin.com/WBnNgHwf

Here is my /var/log/Xorg.0.log: http://pastebin.com/KUzhLNU7

Here is the login screen: i.imgur.com/GJmbFrn.jpg

EDIT: The mouse cursor can travel across all the monitors

EDIT2: middle monitor is displaylink

EDIT3: I can right-click on the greyed out screens and change desktop background and bring up a window, but it will not drag between video cards

EDIT4: running killall nautilus removes white screens, still unable to drag between video cards

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