How to Disable LVDS output in Xorg?

Solution Verified - Updated -

Issue

  • Our desktop computer uses only the VGA port. There is nothing connected to the LVDS port. Yet Xorg tries to output to the LVDS port using 800x600 mode.
  • How to disable one of the display?

Environment

  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 6

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