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)
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https://bugs.launchpad.net/bugs/640609
Title:
desktop background has wrong size when zoomed with laptop and external
monitor attached
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