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