The X.Org environment in Ubuntu is rapidly developing and changing. Further advances and ideas are implemented in each new Ubuntu distribution. Currently, the core utility for configuring your video settings in the Ubuntu desktop is the Screen Resolution utility.
Start the Screen Resolution utility from the Panel menu by selecting System O Preferences O Screen Resolution. The main Screen Resolution utility dialog box, shown in Figure 16-2, appears.
The Screen Resolution dialog box is pretty basic. There are only a few things you can modify here:
♦ Resolution: Select the screen resolution from a list of supported resolutions for your video card and monitor combination. X.Org automatically detects resolutions that are supported and displays only those resolutions.
♦ Refresh Rate: Select the screen refresh rate for your monitor.
♦ Rotation: Set the screen orientation for the monitor. The options are
• Normal: Display the desktop at the normal orientation for the monitor.
• Left: Display the desktop using the left side of the monitor as the top of the desktop.
• Right: Display the desktop using the right side of the monitor as the top of the desktop.
• Upside Down: Display the desktop using the bottom of the monitor as the top of the desktop.
♦ Mirror Screens: Create identical desktops on dual monitor setups instead of expanding the desktop to both monitors.
♦ Detect Displays: Re-scan the video cards and monitors for the workstation.
The Mirror Screens option determines how X.Org handles two or more monitors connected to the workstation. When you select the Mirror Screens check box, X.Org duplicates the desktop on both monitors. However, when you deselect the check box, X.Org separates the two monitors and distributes the desktop layout between them.
When you use this feature, more screen areas appear on the Screen Resolution window area, one box for each monitor connected to the workstation, as shown in Figure 16-3.
You can drag and drop the different monitors in the window. The location of the monitor determines which part of the expanded desktop it displays. If you set the monitor images side by side, the desktop will expand sideways between the monitors. If you set the monitor images one on top of the other, the desktop will expand vertically between the monitors.
Each monitor image has its own group of settings. Click on a monitor image to view the settings for that monitor. By default, X.Org will set the display resolution of the two monitors to their highest common value.
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