The configuration file XF86Config
of the XFree86
project is used by the X server to set necessary configuration parameters.
It is a plain text file ordered into sections and subsections.Important sections are Files
, and ServerLayout
Sections can appear in any order and there may be more than one section of each kind, for example, if you have more than one monitor, say a video projector and an on board LCD of a notebook.
sections are for the physical displaying devices, the Screen
sections are for the logical displays, so you can have two monitors displaying the same content or entirely different information.
The option "SWCursor" in the Device section for example controls whether the mouse pointer is mirrored on an external monitor or suppressed.
On typical Unix
like systems the file often is found in <tt>/etc/X11</tt> and a log file is in <tt>/var/log</tt>, typically named <tt>XFree86.0.log</tt> for the last start of X and <tt>XFree86.0.log.old</tt> for the previous one.
Inappropriate editing of this file may result in a black or illegible screen or might even damage the monitor, especially if it is a CRT
.The user should be able to operate the system through console mode (i.e. "text mode") when configuring X, as X might fail to start due to an invalid configuration leaving the user with merely the CLI.
In the X.org......