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Trying to set up dual monitors but the monitors are mirrored and will not change. They also say laptop but I am using a desktop. I have 2 viewsonic monitors at 1080p. I'm using a sandy bridge cpu with intergrated graphics.

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Are you using the System->Preferences->Monitors applet? Or from a command line;

$ gnome-display-properties

That applet has a button "Detect monitors" and a checkbox for "Same image in all monitors".

Also, you have the laptop lid closed while connected to the two monitors?

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