Commonly used sections in a typical xorg.conf file V

Commonly used sections in a typical xorg.conf file V


The next section is the Modes section. The configuration file may have
one or more of these sections. They define video modes the X server may use.

Here is a sample:


Section "Modes"

  Identifier   "Modes[0]"

  Modeline      "1024x768" 65.0 1024 1048 1184 1344 768 771    777 806
-hsync –vsync

  Modeline      "1024x768" 61.89 1024 1080 1184 1344 768 769 772 794

EndSection




The syntax for the Modes section is as follows:


Section "Modes"

    Identifier "name"

    Modeline parameters

EndSection




The Modeline directive is used to define video modes for the monitor.
It is composed of four components:


• Pixel clock

  This first component specifies the pixel clock rate in MHz. In the first
  Modeline in the preceding example, this is 65.0.



• Horizontal timing

  This second component is a list of four numbers that specify the
  horizontal timing: hdisp, hsyncstart, hsyncend, and htotal. In the
  first Modeline in the example, these values are 1024, 1048, 1184,
  and 1344, respectively.



• Vertical timing

  The third component is a list of four numbers that specify the vertical
  timing: vdisp, vsyncstart, vsyncend, and vtotal. In the first Modeline
  in the example, these values are 768, 771, 777, and 806, respectively.


• Flags

  The fourth component is a list of flags that configure the video mode.
  In the first Modeline in the example, the –hsync and –vsync flags are listed.
  These are used to set the polarity of the hsync and vsync signals.





LX0-104 Exam Objectives (H)