Xorg

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
       supported hardware platform.  Other hardware platforms include Compaq
       Alpha, Intel IA64, SPARC and PowerPC.  The most widely supported
       operating 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
       operating systems include LynxOS, and GNU Hurd.  Darwin and Mac OS X are
       supported 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 preference
       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 parameters 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 parameters, 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 virtual
               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
               AllowMouseOpenFail 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
               AllowNonLocalModInDev 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 framebuffer
               (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 process.
               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
               terminal.  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 occurrence
               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
               applications don't like this pixmap format, even though it is a
               perfectly 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 Layout
               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 verbosity
               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
       application.  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 perform 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 configuration
               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, normally 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
               deactivates 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 initial
       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
       generating 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 information.
       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), trident(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
       Consortium'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
       modification 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)