The X server accepts requests from client applications to create windows,
which are (normally rectangular) "virtual screens" that the client program
can draw into.
Windows are then composed on the actual screen by the X server
(or by a separate composite manager) as directed by the window manager,
which usually communicates with the user via graphical controls such as buttons
and draggable titlebars and borders.
For a comprehensive overview of X Server and X Window System, consult the
All questions regarding this software should be directed at the
Xorg mailing list:
Please submit bug reports to the Xorg bugzilla:
The master development code repository can be found at:
For patch submission instructions, see:
For more information on the git code manager, see: