Silicon Graphics Virtu VN200, Hardware User'S Manual

Page: 69 / 108

Starting the X Window System
007-5483-001 53
Monitor Section
The monitor section contains information that defines the capabilities of your display
You can make specific changes to the monitor section of the
xorg.conf
file by referring
to the documentation that came with the monitor. An example monitor section is shown
below:
Section "Monitor"
Identifier "SDM-P234"
VendorName "SNY"
ModelName "3d0"
HorizSync 28-92
VertRefresh 57-85
ModeLine "1920x1200_60n" 154.0 1920 1968 2000 2080 1200 1203 1209 1235
-hsync -vsync
ModeLine "1600x1200_60n" 162.0 1600 1664 1856 2160 1200 1201 1204 1250
-hsync -vsync
EndSection
Modelines
Modelines provide video format information to be used with a display. Most displays do
not require modelines as the information is returned by the display using Extended
Display Identification Data (EDID).
When a display does not provide, or provides incorrect EDID information, a modeline
may be required. This is often true for visualization environments with video switching
equipment where a EDID information is not returned to the graphics card.
It is possible to create your own modeline using tools such as the one found at:
http://xtiming.sourceforge.net/cgi-bin/xtiming.pl
The mode line is contained in the monitor section of the
xorg.conf
file, and is
associated with a particular display. An example modeline is shown below:
#Modeline description: pxl clk Hres Hfp Hsnc Htot Vres Vfp Vsnc Vtot
#--------------------- ------- ---- ---- ---- ---- ---- ---- ---- ----
Modeline "1600x1200_60" 160.875 1600 1704 1808 2160 1200 1201 1205 1242