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I just got a new computer at work that only has a single DIsplay Port and a single VGA.

I can get the dual monitors in Redhat 6.2 to detect both monitors - but they both display the same thing, and I can't figure out how to make it just extend the desktop.

Where do I set this?

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On Red Hat, go to Main Menu -> System Settings -> Display.

If you want to enable the 2nd monitor, check the box next to Use Dual Head (depending on the version of Red Hat/Linux, there might be a separate tab in the Display dialog window for Dual Head graphics options). To change the 2nd monitor's settings, click Configure.

According to this article, Configuring the system for the second monitor on Red Hat Enterprise Linux 4 and Fedora Core 4, you can enable both monitors to use an "extended desktop" by:

...set the Desktop layout option to Spanning Desktops. To create a pair of independent workspaces, set the Desktop layout option to Individual Desktops. With "spanned desktops" you can drag windows from one monitor to another; with individual desktops only the mouse cursor can move between desktops.

Note that you have to save your settings and then log out and back in (or reboot) your computer in order to see the changes, they won't happen right away.

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I thought I would see this - however, my Display system settings does not have any tab or options for using Dual Head – Derek Jan 20 '12 at 18:04
@Derek then I'm pretty sure your graphics card doesn't support it. I know a lot of PCs will support showing the same screen on multiple displays, but not extended desktops. My older laptop is like that. – studiohack Jan 20 '12 at 18:10
Updated my distro to redhat 6.1 and it worked out of the box. Weird – Derek Jan 25 '12 at 22:11

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