configuring X Windows on HP-UX (other graphics cards)
the XF86Config file
The data given here is used by the X Server to determine if video modes are within the specifications of the monitor. This information should be available in the monitor's handbook. If this entry is omitted, a default range of
VertRefresh gives the range(s) of vertical refresh frequencies supported by the monitor.
DisplaySize is an optional entry gives the width and height, in millimeters, of the picture area of the monitor. If given this is used to calculate the horizontal and vertical pitch (DPI) of the screen. Source: XF86Config man page.
Gamma is an optional entry that can be used to specify the gamma correction for the monitor. It may be specified as either a single value or as three separate RGB values. The values should be in the range 0.1 to 10.0, and the default is 1.0. Not all drivers are capable of using this information. Source: XF86Config man page.
GammaAllLayers is an optional entry that causes the X Server to apply gamma correction to all hardware layers. The default behavior is to apply gamma correction only to the image layer of the device. The overlay planes are not affected by gamma. This option is not supported on all devices.
“Device” section
The config file may have multiple Device sections. There must be at least one, for the video card being used. Device sections have the following format:
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