I think that what you are seeing is your laptop screen being overlaid on your external monitor. Go to System, Preferences, Monitor.
I have laptop w. docking station and external monitor and the following worked for me. Drag and drop laptop screen so it does not overlap monitor Go to System, Preferences. Power management, on AC Power, Put Computer to sleep when incactive for: Never When laptop lid closed Blank screen. ** Changed in: nvidia-graphics-drivers (Ubuntu) Assignee: (unassigned) => ijf8090 (i-finlay) -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to nvidia-graphics-drivers in ubuntu. https://bugs.launchpad.net/bugs/640609 Title: desktop background has wrong size when zoomed with laptop and external monitor attached _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp