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    Command:

    Xorg

    
    
    

    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  by  the  X.Org  Foundation  from  the XFree86
           Project's XFree86 4.4rc2 release.  The XFree86 release  was  originally
           derived from X386 1.2 by Thomas Roell which was contributed to X11R5 by
           Snitily Graphics Consulting Service.
    
    
    

    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, AMD64, SPARC and PowerPC.  The most widely supported
           operating systems are the free/OpenSource  UNIX-like  systems  such  as
           Linux,  FreeBSD, NetBSD, OpenBSD, and Solaris.  Commercial UNIX operat-
           ing systems such as UnixWare are also supported.  Other supported oper-
           ating  systems  include  GNU  Hurd.   Mac  OS  X  is supported with the
           Xquartz(1) X server.  Win32/Cygwin is  supported  with  the  XWin(1)  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.
    
    
           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(5)  configuration  files,  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(5) 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 that have virtual terminal support, such as Linux,
                   BSD, OpenSolaris, SVR3, and SVR4.
    
           -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(5) 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(5)  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.
    
           -config file
                   Read the server configuration from file.  This option will work
                   an initial xorg.conf(5) 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.
    
           -disableVidMode
                   Disable the parts of the VidMode extension (used by  the  xvid-
                   tune  client) that can be used to change the video modes.  This
                   is equivalent to the DisableVidModeExtension xorg.conf(5)  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.
                   Use  the xorg.conf(5) 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(5)  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(5) 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(5) file option.
    
           -pointer pointer-name
                   Use the xorg.conf(5) 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.
    
           -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.
    
           -showDefaultModulePath
                   Print out the default module path the server was compiled with.
    
           -showDefaultLibPath
                   Print out the path libraries should be installed to.
    
           -showopts
                   For each driver module installed, print out the list of options
                   and their argument types.
    
           -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.
    
    
    

    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. These actions depend on the XKB keymap loaded by  a  particular
           keyboard  device  and may or may not be available on a given configura-
           tion.
    
           The following key combinations are commonly part of the  default  XKEY-
           BOARD keymap.
    
           Ctrl+Alt+Backspace
                   Immediately  kills  the server -- no questions asked. It can be
                   disabled by setting the DontZap xorg.conf(5) file option  to  a
                   TRUE value.
    
                   It  should  be  noted  that  zapping is triggered by the Termi-
                   nate_Server action in the keyboard map. This action is not part
                   of  the  default keymaps but can be enabled with the XKB option
                   "terminate:ctrl_alt_bksp".
                   respectively.  This  can  be  disabled  with  the  DontVTSwitch
                   xorg.conf(5) file option.
    
    
    

    CONFIGURATION

           Xorg  typically uses a configuration file called xorg.conf and configu-
           ration files with the suffix .conf in a  directory  called  xorg.conf.d
           for  its  initial  setup.   Refer  to  the xorg.conf(5) manual page for
           information about the format of this file.
    
           Xorg has a mechanism for automatically generating a built-in configura-
           tion  at  run-time  when  no  xorg.conf  file  or xorg.conf.d files are
           present.  The current version of this automatic configuration mechanism
           works in two 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 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 files can be found  in  a  range  of  locations.
           These  are  documented fully in the xorg.conf(5) 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.
    
           /etc/X11/xorg.conf.d          Server configuration directory.
    
           /etc/X11/xorg.conf.d-4        Server configuration directory.
    
           /etc/xorg.conf.d              Server configuration directory.
    
           /usr/etc/xorg.conf.d          Server configuration directory.
    
           /usr/lib/X11/app-defaults/*   Client resource specifications.
    
           /usr/share/man/man?/*         Manual pages.
    
           /etc/Xn.hosts                 Initial access control list  for  display
                                         n.
    
    
    

    SEE ALSO

           X(7),  Xserver(1),  xdm(1),  xinit(1), xorg.conf(5), xvidtune(1), xkey-
           board-config  (7),  apm(4),  ati(4),  chips(4),  cirrus(4),   cyrix(4),
           fbdev(4),  glide(4),  glint(4),  i128(4),  i740(4), imstt(4), intel(4),
           mga(4), neomagic(4), nsc(4), nv(4),  openchrome  (4),  r128(4),  rendi-
           tion(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),
           trident(4), tseng(4), v4l(4), vesa(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
    
           <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 1.11.3 Xorg(1)

    
    
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