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Xorg(1x)							      Xorg(1x)



NAME
       Xorg - X11R6 X server

SYNOPSIS
       Xorg [:display] [option ...]

DESCRIPTION
       Xorg  is a full featured X server that was originally designed for UNIX
       and UNIX-like operating systems running on Intel x86 hardware.  It  now
       runs on a wider range of hardware and OS platforms.

       This work was derived from XFree86 4.4rc2 by the X.Org Foundation.  The
       XFree86 4.4rc2 release was originally derived from X386 1.2  by	Thomas
       Roell  which  was  contributed  to X11R5 by Snitily Graphics Consulting
       Service.	 The Xorg server architecture includes among many other things
       a  loadable module system derived from code donated by Metro Link, Inc.
       The current Xorg release is compatible with X11R6.6.

PLATFORMS
       Xorg operates under a wide range	 of  operating	systems	 and  hardware
       platforms.   The	 Intel x86 (IA32) architecture is the most widely sup-
       ported hardware platform.   Other  hardware  platforms  include	Compaq
       Alpha,  Intel IA64, SPARC and PowerPC.  The most widely supported oper-
       ating systems are the free/OpenSource UNIX-like systems such as	Linux,
       FreeBSD, NetBSD and OpenBSD.  Commercial UNIX operating systems such as
       Solaris (x86) and UnixWare are also supported.  Other supported operat-
       ing systems include LynxOS, and GNU Hurd.  Darwin and Mac OS X are sup-
       ported with the XDarwin(1) X server.  Win32/Cygwin  is  supported  with
       the XWin X server.


NETWORK CONNECTIONS
       Xorg  supports  connections  made  using	 the  following reliable byte-
       streams:

       Local
	   On most platforms, the "Local" connection  type  is	a  UNIX-domain
	   socket.   On	 some System V platforms, the "local" connection types
	   also include STREAMS pipes, named pipes, and some other mechanisms.

       TCPIP
	   Xorg	 listens  on port 6000+n, where n is the display number.  This
	   connection type can be disabled with the -nolisten option (see  the
	   Xserver(1) man page for details).

ENVIRONMENT VARIABLES
       For  operating  systems	that support local connections other than Unix
       Domain sockets (SVR3 and SVR4), there is a compiled-in list  specifying
       the  order  in  which local connections should be attempted.  This list
       can be overridden by the XLOCAL environment variable  described	below.
       If  the	display name indicates a best-choice connection should be made
       (e.g.  :0.0), each connection mechanism is  tried  until	 a  connection
       succeeds or no more mechanisms are available.  Note: for these OSs, the
       Unix Domain socket connection is treated	 differently  from  the	 other
       local  connection  types.   To  use  it	the connection must be made to
       unix:0.0.

       The XLOCAL environment variable should contain a list of one more  more
       of the following:

	       NAMED
	       PTS
	       SCO
	       ISC

       which  represent	 SVR4  Named Streams pipe, Old-style USL Streams pipe,
       SCO XSight Streams pipe, and ISC Streams pipe, respectively.   You  can
       select  a  single  mechanism  (e.g.   XLOCAL=NAMED), or an ordered list
       (e.g. XLOCAL="NAMED:PTS:SCO").  his variable overrides the  compiled-in
       defaults.   For	SVR4 it is recommended that NAMED be the first prefer-
       ence connection.	 The default setting is PTS:NAMED:ISC:SCO.

       To globally override the compiled-in defaults, you should  define  (and
       export  if  using  sh or ksh) XLOCAL globally.  If you use startx(1) or
       xinit(1), the definition should be at the top of	 your  .xinitrc	 file.
       If  you	use  xdm(1),  the  definitions	should	be  early  on  in  the
       /usr/lib/X11/xdm/Xsession script.

OPTIONS
       Xorg supports several mechanisms for supplying/obtaining	 configuration
       and  run-time  parameters: command line options, environment variables,
       the xorg.conf(5x)  configuration	 file,	auto-detection,	 and  fallback
       defaults.   When the same information is supplied in more than one way,
       the highest precedence mechanism is used.  The list  of	mechanisms  is
       ordered	from  highest precedence to lowest.  Note that not all parame-
       ters can be supplied via	 all  methods.	 The  available	 command  line
       options	and  environment  variables  (and some defaults) are described
       here and in the Xserver(1) manual page.	Most configuration file param-
       eters,  with  their defaults, are described in the xorg.conf(5x) manual
       page.   Driver  and  module  specific  configuration   parameters   are
       described in the relevant driver or module manual page.

       In  addition  to	 the normal server options described in the Xserver(1)
       manual page, Xorg accepts the following command line switches:

       vtXX    XX specifies the Virtual Terminal device number which Xorg will
	       use.   Without  this option, Xorg will pick the first available
	       Virtual Terminal that it can locate.  This option applies  only
	       to  platforms such as Linux, BSD, SVR3 and SVR4, that have vir-
	       tual terminal support.

       -allowMouseOpenFail
	       Allow the server to start up even if the mouse device can't  be
	       opened  or  initialised.	  This	is  equivalent	to  the Allow-
	       MouseOpenFail xorg.conf(5x) file option.

       -allowNonLocalModInDev
	       Allow changes to keyboard and  mouse  settings  from  non-local
	       clients.	  By  default,	connections from non-local clients are
	       not allowed to do this.	This is equivalent to the  AllowNonLo-
	       calModInDev xorg.conf(5x) file option.

       -allowNonLocalXvidtune
	       Make  the  VidMode extension available to remote clients.  This
	       allows the xvidtune client to connect from another host.	  This
	       is  equivalent  to the AllowNonLocalXvidtune xorg.conf(5x) file
	       option.	By default non-local connections are not allowed.

       -bgamma value
	       Set the blue gamma correction.  value must be between  0.1  and
	       10.   The  default  is 1.0.  Not all drivers support this.  See
	       also the -gamma, -rgamma, and -ggamma options.

       -bpp n  No longer supported.  Use -depth to set the  color  depth,  and
	       use  -fbbpp  if	you  really need to force a non-default frame-
	       buffer (hardware) pixel format.

       -configure
	       When this option is specified, the Xorg server loads all	 video
	       driver  modules,	 probes for available hardware, and writes out
	       an initial xorg.conf(5x) file based on what was detected.  This
	       option  currently  has  some problems on some platforms, but in
	       most cases it is a good way to bootstrap the configuration pro-
	       cess.   This option is only available when the server is run as
	       root (i.e, with real-uid 0).

       -crt /dev/ttyXX
	       SCO only.  This is the same as the vt option, and  is  provided
	       for compatibility with the native SCO X server.

       -depth n
	       Sets  the  default  color depth.	 Legal values are 1, 4, 8, 15,
	       16, and 24.  Not all drivers support all values.

       -disableModInDev
	       Disable dynamic modification of input device settings.  This is
	       equivalent to the DisableModInDev xorg.conf(5x) file option.

       -disableVidMode
	       Disable	the  the  parts	 of the VidMode extension (used by the
	       xvidtune client) that can be used to change  the	 video	modes.
	       This is equivalent to the DisableVidModeExtension xorg.conf(5x)
	       file option.

       -fbbpp n
	       Sets the number of framebuffer bits per pixel.  You should only
	       set this if you're sure it's necessary; normally the server can
	       deduce the correct value from -depth above.  Useful if you want
	       to  run	a  depth  24  configuration  with a 24 bpp framebuffer
	       rather than the (possibly default) 32 bpp framebuffer (or  vice
	       versa).	 Legal	values	are 1, 8, 16, 24, 32.  Not all drivers
	       support all values.

       -flipPixels
	       Swap the default values for the black and white pixels.

       -gamma value
	       Set the gamma correction.  value must be between	 0.1  and  10.
	       The  default is 1.0.  This value is applied equally to the R, G
	       and B values.  Those values can be set independently  with  the
	       -rgamma, -bgamma, and -ggamma options.  Not all drivers support
	       this.

       -ggamma value
	       Set the green gamma correction.	value must be between 0.1  and
	       10.   The  default  is 1.0.  Not all drivers support this.  See
	       also the -gamma, -rgamma, and -bgamma options.

       -ignoreABI
	       The Xorg server checks the ABI revision levels of  each	module
	       that  it	 loads.	  It will normally refuse to load modules with
	       ABI revisions that  are	newer  than  the  server's.   This  is
	       because	such modules might use interfaces that the server does
	       not have.  When this option is specified, mismatches like  this
	       are  downgraded	from  fatal  errors  to warnings.  This option
	       should be used with care.

       -isolateDevice bus-id
	       Restrict device resets to the device  at	 bus-id.   The	bus-id
	       string	has   the   form   bustype:bus:device:function	(e.g.,
	       'PCI:1:0:0').  At present, only isolation  of  PCI  devices  is
	       supported;  i.e., this option is ignored if bustype is anything
	       other than 'PCI'.

       -keeptty
	       Prevent the server from detaching its initial controlling  ter-
	       minal.	This  option is only useful when debugging the server.
	       Not all platforms support (or can use) this option.

       -keyboard keyboard-name
	       Use the xorg.conf(5x) file InputDevice section called keyboard-
	       name  as	 the  core  keyboard.  This option is ignored when the
	       Layout section specifies a core keyboard.  In  the  absence  of
	       both  a	Layout	section	 and  this  option, the first relevant
	       InputDevice section is used for the core keyboard.

       -layout layout-name
	       Use the xorg.conf(5x) file Layout section  called  layout-name.
	       By default the first Layout section is used.

       -logfile filename
	       Use  the file called filename as the Xorg server log file.  The
	       default log file	 is  /var/log/Xorg.n.log  on  most  platforms,
	       where  n is the display number of the Xorg server.  The default
	       may be in a different directory on some platforms.  This option
	       is  only	 available  when  the server is run as root (i.e, with
	       real-uid 0).

       -logverbose [n]
	       Sets the verbosity level for information printed	 to  the  Xorg
	       server  log  file.   If the n value isn't supplied, each occur-
	       rence of this option increments the log file  verbosity	level.
	       When  the  n value is supplied, the log file verbosity level is
	       set to that value.  The default log file verbosity level is  3.

       -modulepath searchpath
	       Set  the	 module	 search	 path  to searchpath.  searchpath is a
	       comma separated list of directories to search for  Xorg	server
	       modules.	  This option is only available when the server is run
	       as root (i.e, with real-uid 0).

       -nosilk Disable Silken Mouse support.

       -pixmap24
	       Set the internal pixmap format for depth 24 pixmaps to 24  bits
	       per pixel.  The default is usually 32 bits per pixel.  There is
	       normally little reason to use this option.  Some client	appli-
	       cations don't like this pixmap format, even though it is a per-
	       fectly  legal  format.	This  is  equivalent  to  the	Pixmap
	       xorg.conf(5x) file option.

       -pixmap32
	       Set  the internal pixmap format for depth 24 pixmaps to 32 bits
	       per pixel.  This is usually the default.	 This is equivalent to
	       the Pixmap xorg.conf(5x) file option.

       -pointer pointer-name
	       Use  the xorg.conf(5x) file InputDevice section called pointer-
	       name as the core pointer.  This option is ignored when the Lay-
	       out section specifies a core pointer.  In the absence of both a
	       Layout section and this option, the first relevant  InputDevice
	       section is used for the core pointer.

       -probeonly
	       Causes  the server to exit after the device probing stage.  The
	       xorg.conf(5x) file is still used when this option is given,  so
	       information  that can be auto-detected should be commented out.

       -quiet  Suppress most informational messages at startup.	 The verbosity
	       level is set to zero.

       -rgamma value
	       Set  the	 red  gamma correction.	 value must be between 0.1 and
	       10.  The default is 1.0.	 Not all drivers  support  this.   See
	       also the -gamma, -bgamma, and -ggamma options.

       -scanpci
	       When  this  option  is specified, the Xorg server scans the PCI
	       bus, and prints out some information about each device that was
	       detected.  See also scanpci(1) and pcitweak(1).

       -screen screen-name
	       Use  the	 xorg.conf(5x) file Screen section called screen-name.
	       By default the screens referenced by the default Layout section
	       are  used, or the first Screen section when there are no Layout
	       sections.

       -showconfig
	       This is the same as the -version option, and  is	 included  for
	       compatibility  reasons.	It may be removed in a future release,
	       so the -version option should be used instead.

       -weight nnn
	       Set RGB weighting at 16 bpp.  The default is 565.  This applies
	       only to those drivers which support 16 bpp.

       -verbose [n]
	       Sets the verbosity level for information printed on stderr.  If
	       the n value isn't supplied,  each  occurrence  of  this	option
	       increments  the verbosity level.	 When the n value is supplied,
	       the verbosity level is set to that  value.   The	 default  ver-
	       bosity level is 0.

       -version
	       Print  out  the	server	version, patchlevel, release date, the
	       operating system/platform it  was  built	 on,  and  whether  it
	       includes module loader support.

       -showDefaultLibPath
	       Print out the path libraries should be installed to.

       -config file
	       Read the server configuration from file.	 This option will work
	       for any file when the server is run as root (i.e, with real-uid
	       0),  or	for files relative to a directory in the config search
	       path for all other users.

KEYBOARD
       The Xorg server is normally configured  to  recognize  various  special
       combinations  of	 key  presses that instruct the server to perform some
       action, rather than just sending the key press event to a client appli-
       cation.	 The  default  XKEYBOARD  keymap  defines the key combinations
       listed below.  The server also has these key  combinations  builtin  to
       its  event handler for cases where the XKEYBOARD extension is not being
       used.  When using the XKEYBOARD extension, which key combinations  per-
       form which actions is completely configurable.

       For  more  information  about when the builtin event handler is used to
       recognize the special key combinations, see the	documentation  on  the
       HandleSpecialKeys option in the xorg.conf(5x) man page.

       The  special  combinations  of  key presses recognized directly by Xorg
       are:

       Ctrl+Alt+Backspace
	       Immediately kills the server -- no questions asked.   This  can
	       be disabled with the DontZap xorg.conf(5x) file option.

       Ctrl+Alt+Keypad-Plus
	       Change  video  mode  to next one specified in the configuration
	       file.  This can be disabled  with  the  DontZoom	 xorg.conf(5x)
	       file option.

       Ctrl+Alt+Keypad-Minus
	       Change  video  mode to previous one specified in the configura-
	       tion  file.   This  can	 be   disabled	 with	the   DontZoom
	       xorg.conf(5x) file option.

       Ctrl+Alt+Keypad-Multiply
	       Not  treated  specially by default.  If the AllowClosedownGrabs
	       xorg.conf(5x) file option is specified, this key sequence kills
	       clients	with  an  active  keyboard  or	mouse  grab as well as
	       killing any application that may have locked the	 server,  nor-
	       mally using the XGrabServer(3x) Xlib function.

       Ctrl+Alt+Keypad-Divide
	       Not  treated specially by default.  If the AllowDeactivateGrabs
	       xorg.conf(5x) file option is specified, this key sequence deac-
	       tivates any active keyboard and mouse grabs.

       Ctrl+Alt+F1...F12
	       For  BSD and Linux systems with virtual terminal support, these
	       keystroke combinations are used to switch to virtual  terminals
	       1  through  12,	respectively.	This  can be disabled with the
	       DontVTSwitch xorg.conf(5x) file option.

CONFIGURATION
       Xorg typically uses a configuration file called xorg.conf for its  ini-
       tial  setup.   Refer  to	 the xorg.conf(5x) manual page for information
       about the format of this file.

       Starting with version 4.4, Xorg has a mechanism for automatically  gen-
       erating	a built-in configuration at run-time when no xorg.conf file is
       present.	 The current version of this automatic configuration mechanism
       works in three ways.

       The  first  is  via  enhancements that have made many components of the
       xorg.conf file optional.	 This  means  that  information	 that  can  be
       probed  or  reasonably deduced doesn't need to be specified explicitly,
       greatly reducing the amount of built-in configuration information  that
       needs to be generated at run-time.

       The  second  is	to  use	 an external utility called getconfig(1), when
       available, to use meta-configuration information to generate a suitable
       configuration  for  the	primary	 video device.	The meta-configuration
       information can be updated to allow an existing installation to get the
       best  out  of  new hardware or to work around bugs that are found post-
       release.

       The third is to have "safe" fallbacks for most  configuration  informa-
       tion.  This maximises the likelihood that the Xorg server will start up
       in some usable configuration even when information about	 the  specific
       hardware is not available.

       The  automatic  configuration support for Xorg is work in progress.  It
       is currently aimed at the most popular hardware and software  platforms
       supported by Xorg.  Enhancements are planned for future releases.

FILES
       The  Xorg  server  config  file	can  be found in a range of locations.
       These are documented fully in the xorg.conf(5x) manual page.  The  most
       commonly used locations are shown here.

       /etc/X11/xorg.conf	     Server configuration file.

       /etc/X11/xorg.conf-4	     Server configuration file.

       /etc/xorg.conf		     Server configuration file.

       /usr/etc/xorg.conf	     Server configuration file.

       /usr/lib/X11/xorg.conf	     Server configuration file.

       /var/log/Xorg.n.log	     Server log file for display n.

       /usr/bin/*		     Client binaries.

       /usr/include/*		     Header files.

       /usr/lib/*		     Libraries.

       /usr/lib/X11/fonts/*	     Fonts.

       /usr/lib/X11/rgb.txt	     Color names to RGB mapping.

       /usr/lib/X11/XErrorDB	     Client error message database.

       /usr/lib/X11/app-defaults/*   Client resource specifications.

       /usr/man/man?/*		     Manual pages.

       /etc/Xn.hosts		     Initial  access  control list for display
				     n.

SEE ALSO
       X(7), Xserver(1x), xdm(1x), xinit(1x),  xorg.conf(5x),  xorgconfig(1x),
       xorgcfg(1x),   xvidtune(1x),   apm(4),	ati(4),	 chips(4),  cirrus(4),
       cyrix(4), fbdev(4),  glide(4),  glint(4),  i128(4),  i740(4),  i810(4),
       imstt(4),  mga(4),  neomagic(4),	 nsc(4), nv(4), r128(4), rendition(4),
       s3virge(4), siliconmotion(4), sis(4), sunbw2(4), suncg14(4), suncg3(4),
       suncg6(4),  sunffb(4),  sunleo(4),  suntcx(4),  tdfx(4),	 tga(4),  tri-
       dent(4), tseng(4), v4l(4), vesa(4), vga(4), vmware(4),
       Web site <http://www.x.org>.


AUTHORS
       Xorg has many contributors world wide.  The names of most of  them  can
       be  found in the documentation, CHANGELOG files in the source tree, and
       in the actual source code.

       Xorg was originally based on XFree86 4.4rc2.  That was originally based
       on  X386	 1.2 by Thomas Roell, which was contributed to the then X Con-
       sortium's X11R5 distribution by SGCS.

       Xorg is released by the X.org Foundation.

       The project that became XFree86 was originally founded in 1992 by David
       Dawes, Glenn Lai, Jim Tsillas and David Wexelblat.

       XFree86	was  later integrated in the then X Consortium's X11R6 release
       by a group of dedicated XFree86 developers, including the following:

	   Stuart Anderson    anderson@metrolink.com
	   Doug Anson	      danson@lgc.com
	   Gertjan Akkerman   akkerman@dutiba.twi.tudelft.nl
	   Mike Bernson	      mike@mbsun.mlb.org
	   Robin Cutshaw      robin@XFree86.org
	   David Dawes	      dawes@XFree86.org
	   Marc Evans	      marc@XFree86.org
	   Pascal Haible      haible@izfm.uni-stuttgart.de
	   Matthieu Herrb     Matthieu.Herrb@laas.fr
	   Dirk Hohndel	      hohndel@XFree86.org
	   David Holland      davidh@use.com
	   Alan Hourihane     alanh@fairlite.demon.co.uk
	   Jeffrey Hsu	      hsu@soda.berkeley.edu
	   Glenn Lai	      glenn@cs.utexas.edu
	   Ted Lemon	      mellon@ncd.com
	   Rich Murphey	      rich@XFree86.org
	   Hans Nasten	      nasten@everyware.se
	   Mark Snitily	      mark@sgcs.com
	   Randy Terbush      randyt@cse.unl.edu
	   Jon Tombs	      tombs@XFree86.org
	   Kees Verstoep      versto@cs.vu.nl
	   Paul Vixie	      paul@vix.com
	   Mark Weaver	      Mark_Weaver@brown.edu
	   David Wexelblat    dwex@XFree86.org
	   Philip Wheatley    Philip.Wheatley@ColumbiaSC.NCR.COM
	   Thomas Wolfram     wolf@prz.tu-berlin.de
	   Orest Zborowski    orestz@eskimo.com

       Xorg source is available from the FTP  server  <ftp://ftp.x.org/>,  and
       from the X.org server <http://www.freedesktop.org/cvs/>.	 Documentation
       and  other  information	can  be	 found	from  the   X.org   web	  site
       <http://www.x.org/>.


LEGAL
       Xorg is copyright software, provided under licenses that permit modifi-
       cation and redistribution in source and binary form without fee.	  Xorg
       is  copyright  by  numerous  authors  and  contributors from around the
       world.  Licensing  information  can  be	found  at  <http://www.x.org>.
       Refer to the source code for specific copyright notices.

       XFree86(TM) is a trademark of The XFree86 Project, Inc.

       X11(TM) and X Window System(TM) are trademarks of The Open Group.



X Version 11		       xorg-server 1.1.1		      Xorg(1x)
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