Creation of a New Modeline for a Nonstandard, Unsupported Display Size in a Red Hat Linux, XFree86 Environment

摘要

Nonstandard display modes for irregular display sizes are not readily supported by the Red Hat Linux operating system. This lack of support leads to the wasting of screen space when one uses either the text mode or X Windows interfaces. The problem becomes especially prevalent in the X environment. The system will not correctly detect the size of the screen and may project images off screen or images that are too small to take advantage of the full viewable capacity of the screen. To correct this problem, a new modeline must be created that defines the total viewable area of the monitor. This newly created modeline will allow the X server to display any and all images within the bounds of the screen. To accomplish this task, one must modify the XF86Config file to include the newly created modeline, as well as, any display options necessary to the display adapter for proper image display. This report focuses specifically on the creation of a nonstandard '800 x 480' modeline for the Toshiba Libretto 100CT. This report should serve as an adequate guide for the creation of other nonstandard modelines.