XF86Config(5)
- NetBSD Manual Pages
XF86Config(5) XF86Config(5)
NAME
XF86Config - Configuration File for XFree86
INTRODUCTION
XFree86 supports several mechanisms for supplying/obtaining configura-
tion and run-time parameters: command line options, environment vari-
ables, the XF86Config 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 in
the Xserver(1) and XFree86(1) manual pages. Most configuration file
parameters, with their defaults, are described below. Driver and mod-
ule specific configuration parameters are described in the relevant
driver or module manual page.
Starting with version 4.4, XFree86 has support for generating a usable
configuration at run-time when no XF86Config file is provided. The
initial version of this automatic configuration support is targeted at
the most popular hardware and software platforms supported by XFree86.
Some details about how this works can be found in the XFree86(1) and
getconfig(1) manual pages.
Starting with version 4.5, it is possible for this automatically gener-
ated configuration to supplement a partial static configuration. The
partial static configuration can be used to provide non-default config-
uration details for things that are not currently handled by the auto-
matic configuration mechanism.
DESCRIPTION
XFree86 uses a configuration file called XF86Config for its initial
setup. This configuration file is searched for in the following places
when the server is started as a normal user:
/etc/X11/<cmdline>
/usr/X11R6/etc/X11/<cmdline>
/etc/X11/$XF86CONFIG
/usr/X11R6/etc/X11/$XF86CONFIG
/etc/X11/XF86Config-4
/etc/X11/XF86Config
/etc/XF86Config
/usr/X11R6/etc/X11/XF86Config.<hostname>
/usr/X11R6/etc/X11/XF86Config-4
/usr/X11R6/etc/X11/XF86Config
/usr/X11R6/lib/X11/XF86Config.<hostname>
/usr/X11R6/lib/X11/XF86Config-4
/usr/X11R6/lib/X11/XF86Config
where <cmdline> is a relative path (with no ".." components) specified
with the -xf86config command line option, $XF86CONFIG is the relative
path (with no ".." components) specified by that environment variable,
and <hostname> is the machine's hostname as reported by gethostname(3).
When the XFree86 server is started by the "root" user, the config file
search locations are as follows:
<cmdline>
/etc/X11/<cmdline>
/usr/X11R6/etc/X11/<cmdline>
$XF86CONFIG
/etc/X11/$XF86CONFIG
/usr/X11R6/etc/X11/$XF86CONFIG
$HOME/XF86Config
/etc/X11/XF86Config-4
/etc/X11/XF86Config
/etc/XF86Config
/usr/X11R6/etc/X11/XF86Config.<hostname>
/usr/X11R6/etc/X11/XF86Config-4
/usr/X11R6/etc/X11/XF86Config
/usr/X11R6/lib/X11/XF86Config.<hostname>
/usr/X11R6/lib/X11/XF86Config-4
/usr/X11R6/lib/X11/XF86Config
where <cmdline> is the path specified with the -xf86config command line
option (which may be absolute or relative), $XF86CONFIG is the path
specified by that environment variable (absolute or relative), $HOME is
the path specified by that environment variable (usually the home
directory), and <hostname> is the machine's hostname as reported by
gethostname(3).
The XF86Config file is composed of a number of sections which may be
present in any order. Each section has the form:
Section "SectionName"
SectionEntry
...
EndSection
The section names are:
Files File pathnames
ServerFlags Server flags
Module Dynamic module loading
InputDevice Input device description
Device Graphics device description
VideoAdaptor Xv video adaptor description
Monitor Monitor description
Modes Video modes descriptions
Screen Screen configuration
ServerLayout Overall layout
DRI DRI-specific configuration
Vendor Vendor-specific configuration
The following obsolete section names are still recognised for compati-
bility purposes. In new config files, the InputDevice section should
be used instead.
Keyboard Keyboard configuration
Pointer Pointer/mouse configuration
The old XInput section is no longer recognised.
The ServerLayout sections are at the highest level. They bind together
the input and output devices that will be used in a session. The input
devices are described in the InputDevice sections. Output devices usu-
ally consist of multiple independent components (e.g., and graphics
board and a monitor). These multiple components are bound together in
the Screen sections, and it is these that are referenced by the Server-
Layout section. Each Screen section binds together a graphics board
and a monitor. The graphics boards are described in the Device sec-
tions, and the monitors are described in the Monitor sections.
Config file keywords are case-insensitive, and "_" characters are
ignored. Most strings (including Option names) are also case-insensi-
tive, and insensitive to white space and "_" characters.
Each config file entry usually takes up a single line in the file.
They consist of a keyword, which is possibly followed by one or more
arguments, with the number and types of the arguments depending on the
keyword. The argument types are:
Integer an integer number in decimal, hex or octal
Real a floating point number
String a string enclosed in double quote marks (")
Note: hex integer values must be prefixed with "0x", and octal values
with "0".
A special keyword called Option may be used to provide free-form data
to various components of the server. The Option keyword takes either
one or two string arguments. The first is the option name, and the
optional second argument is the option value. Some commonly used
option value types include:
Integer an integer number in decimal, hex or octal
Real a floating point number
String a sequence of characters
Boolean a boolean value (see below)
Frequency a frequency value (see below)
Note that all Option values, not just strings, must be enclosed in
quotes.
Boolean options may optionally have a value specified. When no value
is specified, the option's value is TRUE. The following boolean option
values are recognised as TRUE:
1, on, true, yes
and the following boolean option values are recognised as FALSE:
0, off, false, no
If an option name is prefixed with "No", then the option value is
negated.
Example: the following option entries are equivalent:
Option "Accel" "Off"
Option "NoAccel"
Option "NoAccel" "On"
Option "Accel" "false"
Option "Accel" "no"
Frequency option values consist of a real number that is optionally
followed by one of the following frequency units:
Hz, k, kHz, M, MHz
When the unit name is omitted, the correct units will be determined
from the value and the expectations of the appropriate range of the
value. It is recommended that the units always be specified when using
frequency option values to avoid any errors in determining the value.
FILES SECTION
The config file may have multiple Files sections. These are used to
specify some path names required by the server. Earlier Files sections
have priority over later sections. This means that a path name speci-
fied in a Files section cannot be overridden by a later Files section
(this behaviour may change in the future). Some of these paths can
also be set from the command line (see Xserver(1) and XFree86(1)). The
command line settings override the values specified in the config file.
The Files section is optional, as are all of the entries that may
appear in it.
The entries that can appear in this section are:
Identifier "name"
specifies an optional identifying name for the Files section.
FontPath "path"
sets the search path for fonts. This path is a comma separated
list of font path elements which the XFree86 server searches for
font databases. Multiple FontPath entries may be specified, and
they will be concatenated to build up the fontpath used by the
server. Font path elements may be either absolute directory
paths, or a font server identifier. Font server identifiers
have the form:
<trans>/<hostname>:<port-number>
where <trans> is the transport type to use to connect to the
font server (e.g., unix for UNIX-domain sockets or tcp for a
TCP/IP connection), <hostname> is the hostname of the machine
running the font server, and <port-number> is the port number
that the font server is listening on (usually 7100).
When this entry is not specified in the config file, the server
falls back to the compiled-in default font path, which contains
the following font path elements:
/usr/X11R6/lib/X11/fonts/misc/
/usr/X11R6/lib/X11/fonts/Speedo/
/usr/X11R6/lib/X11/fonts/Type1/
/usr/X11R6/lib/X11/fonts/CID/
/usr/X11R6/lib/X11/fonts/75dpi/
/usr/X11R6/lib/X11/fonts/100dpi/
The recommended font path contains the following font path ele-
ments:
/usr/X11R6/lib/X11/fonts/local/
/usr/X11R6/lib/X11/fonts/misc/
/usr/X11R6/lib/X11/fonts/75dpi/:unscaled
/usr/X11R6/lib/X11/fonts/100dpi/:unscaled
/usr/X11R6/lib/X11/fonts/Type1/
/usr/X11R6/lib/X11/fonts/CID/
/usr/X11R6/lib/X11/fonts/Speedo/
/usr/X11R6/lib/X11/fonts/75dpi/
/usr/X11R6/lib/X11/fonts/100dpi/
Font path elements that are found to be invalid are removed from
the font path when the server starts up.
RGBPath "path"
sets the path name for the RGB color database. When this entry
is not specified in the config file, the server falls back to
the compiled-in default RGB path, which is:
/usr/X11R6/lib/X11/rgb
Note that an implicit .txt is added to this path if the server was com-
piled to use text rather than binary format RGB color databases.
ModulePath "path"
sets the search path for loadable XFree86 server modules. This
path is a comma separated list of directories which the XFree86
server searches for loadable modules loading in the order speci-
fied. Multiple ModulePath entries may be specified, and they
will be concatenated to build the module search path used by the
server.
Options
Option flags may be specified in Files sections.
SERVERFLAGS SECTION
The config file may have multiple ServerFlags sections. These are used
to specify some global XFree86 server options. Earlier ServerFlags
sections have priority over later sections. This means that an option
specified in a ServerFlags section cannot be overridden by a later
ServerFlags section. Except for the Identifier entry, all of the
entries in this section are Options, although for compatibility pur-
poses some of the old style entries are still recognised. Those old
style entries are not documented here, and using them is discouraged.
The ServerFlags section is optional, as are the entries that may be
specified in it.
Options specified in this section (with the exception of the "Default-
ServerLayout" Option) may be overridden by Options specified in the
active ServerLayout section. Options with command line equivalents are
overridden when their command line equivalent is used. Entries recog-
nised by this section are:
Identifier "name"
specifies an optional identifying name for the ServerFlags sec-
tion.
Option "DefaultServerLayout" "layout-id"
This specifies the default ServerLayout section to use in the
absence of the -layout command line option.
Option "NoTrapSignals" "boolean"
This prevents the XFree86 server from trapping a range of unex-
pected fatal signals and exiting cleanly. Instead, the XFree86
server will die and drop core where the fault occurred. The
default behaviour is for the XFree86 server to exit cleanly, but
still drop a core file. In general you never want to use this
option unless you are debugging an XFree86 server problem and
know how to deal with the consequences.
Option "DontVTSwitch" "boolean"
This disallows the use of the Ctrl+Alt+Fn sequence (where Fn
refers to one of the numbered function keys). That sequence is
normally used to switch to another "virtual terminal" on operat-
ing systems that have this feature. When this option is
enabled, that key sequence has no special meaning and is passed
to clients. Default: off.
Option "DontZap" "boolean"
This disallows the use of the Ctrl+Alt+Backspace sequence. That
sequence is normally used to terminate the XFree86 server. When
this option is enabled, that key sequence has no special meaning
and is passed to clients. Default: off.
Option "DontZoom" "boolean"
This disallows the use of the Ctrl+Alt+Keypad-Plus and
Ctrl+Alt+Keypad-Minus sequences. These sequences allows you to
switch between video modes. When this option is enabled, those
key sequences have no special meaning and are passed to clients.
Default: off.
Option "DisableVidModeExtension" "boolean"
This disables the parts of the VidMode extension used by the
xvidtune client that can be used to change the video modes.
Default: the VidMode extension is enabled.
Option "AllowNonLocalXvidtune" "boolean"
This allows the xvidtune client (and other clients that use the
VidMode extension) to connect from another host. Default: off.
Option "DisableModInDev" "boolean"
This disables the parts of the XFree86-Misc extension that can
be used to modify the input device settings dynamically.
Default: that functionality is enabled.
Option "AllowNonLocalModInDev" "boolean"
This allows a client to connect from another host and change
keyboard and mouse settings in the running server. Default:
off.
Option "AllowMouseOpenFail" "boolean"
This allows the server to start up even if the mouse device
can't be opened/initialised. Default: false.
Option "VTInit" "command"
Runs command after the VT used by the server has been opened.
The command string is passed to "/bin/sh -c", and is run with
the real user's id with stdin and stdout set to the VT. The
purpose of this option is to allow system dependent VT initiali-
sation commands to be run. This option should rarely be needed.
Default: not set.
Option "VTSysReq" "boolean"
enables the SYSV-style VT switch sequence for non-SYSV systems
which support VT switching. This sequence is Alt-SysRq followed
by a function key (Fn). This prevents the XFree86 server trap-
ping the keys used for the default VT switch sequence, which
means that clients can access them. Default: off.
Option "XkbDisable" "boolean"
disable/enable the XKEYBOARD extension. The -kb command line
option overrides this config file option. Default: XKB is
enabled.
Option "BlankTime" "time"
sets the inactivity timeout for the blanking phase of the
screensaver. time is in minutes. This is equivalent to the
XFree86 server's `-s' flag, and the value can be changed at run-
time with xset(1). Default: 10 minutes.
Option "StandbyTime" "time"
sets the inactivity timeout for the "standby" phase of DPMS
mode. time is in minutes, and the value can be changed at run-
time with xset(1). Default: 20 minutes. This is only suitable
for VESA DPMS compatible monitors, and may not be supported by
all video drivers. It is only enabled for screens that have the
"DPMS" option set (see the MONITOR section below).
Option "SuspendTime" "time"
sets the inactivity timeout for the "suspend" phase of DPMS
mode. time is in minutes, and the value can be changed at run-
time with xset(1). Default: 30 minutes. This is only suitable
for VESA DPMS compatible monitors, and may not be supported by
all video drivers. It is only enabled for screens that have the
"DPMS" option set (see the MONITOR section below).
Option "OffTime" "time"
sets the inactivity timeout for the "off" phase of DPMS mode.
time is in minutes, and the value can be changed at run-time
with xset(1). Default: 40 minutes. This is only suitable for
VESA DPMS compatible monitors, and may not be supported by all
video drivers. It is only enabled for screens that have the
"DPMS" option set (see the MONITOR section below).
Option "Pixmap" "bpp"
This sets the pixmap format to use for depth 24. Allowed values
for bpp are 24 and 32. Default: 32 unless driver constraints
don't allow this (which is rare). Note: some clients don't
behave well when this value is set to 24.
Option "PC98" "boolean"
Specify that the machine is a Japanese PC-98 machine. This
should not be enabled for anything other than the Japanese-spe-
cific PC-98 architecture. Default: auto-detected.
Option "Log" "logflag"
This option enables special handling for log files that may be
useful when debugging certain types of problems. The values for
logflag are Flush and Sync. Flush causes the log file buffer to
be flushed after each write. Sync causes the log file buffer to
be flushed and the file data to be written to the disk after
each write. The default is for neither of these flags to be
enabled. Enabling these flags during normal operation may
degrade performance and/or lengthen startup time.
Option "NoPM" "boolean"
Disables something to do with power management events. Default:
PM enabled on platforms that support it.
Option "Xinerama" "boolean"
enable or disable XINERAMA extension. Default is disabled.
Option "AllowDeactivateGrabs" "boolean"
This option enables the use of the Ctrl+Alt+Keypad-Divide key
sequence to deactivate any active keyboard and mouse grabs.
Default: off.
Option "AllowClosedownGrabs" "boolean"
This option enables the use of the Ctrl+Alt+Keypad-Multiply key
sequence to kill clients with an active keyboard or mouse grab
as well as killing any application that may have locked the
server, normally using the XGrabServer(3) Xlib function.
Default: off.
Note that the options AllowDeactivateGrabs and AllowClosedown-
Grabs will allow users to remove the grab used by screen
saver/locker programs. An API was written to such cases. If you
enable this option, make sure your screen saver/locker is
updated.
Option "HandleSpecialKeys" "when"
This option controls when the server uses the builtin handler to
process special key combinations (such as Ctrl+Alt+Backspace).
Normally the XKEYBOARD extension keymaps will provide mappings
for each of the special key combinations, so the builtin handler
is not needed unless the XKEYBOARD extension is disabled. The
value of when can be Always, Never, or WhenNeeded. Default: Use
the builtin handler only if needed. The server will scan the
keymap for a mapping to the Terminate action and, if found, use
XKEYBOARD for processing actions, otherwise the builtin handler
will be used.
MODULE SECTION
The config file may have multiple Module section. They are used to
specify additional XFree86 server modules to be loaded. This section
is ignored when the XFree86 server is built in static form. The types
of modules normally loaded in this section are XFree86 server extension
modules, and font rasteriser modules. Most other module types are
loaded automatically when they are needed via other mechanisms. The
Module section is optional, as are all of the entries that may be spec-
ified in it.
Identifier "name"
specifies an optional identifying name for the Module section.
Options
Option flags may be specified in Module sections.
Entries that identify which modules to pre-load may be in two forms.
The first and most commonly used form is an entry that uses the Load
keyword, as described here:
Load "modulename"
This instructs the server to load the module called modulename.
The module name given should be the module's standard name, not
the module file name. The standard name is case-sensitive, and
does not include the "lib" prefix, or the ".a", ".o", or ".so"
suffixes.
Example: the Type 1 font rasteriser can be loaded with the fol-
lowing entry:
Load "type1"
The second form of entry is a SubSection, with the subsection name
being the module name, and the contents of the SubSection being Options
that are passed to the module when it is loaded.
Example: the extmod module (which contains a miscellaneous group of
server extensions) can be loaded, with the XFree86-DGA extension dis-
abled by using the following entry:
SubSection "extmod"
Option "omit XFree86-DGA"
EndSubSection
Modules are searched for in each directory specified in the ModulePath
search path, and in the drivers, input, extensions, fonts, and internal
subdirectories of each of those directories. In addition to this,
operating system specific subdirectories of all the above are searched
first if they exist.
To see what font and extension modules are available, check the con-
tents of the following directories:
/usr/X11R6/lib/modules/fonts
/usr/X11R6/lib/modules/extensions
The "bitmap" font modules is loaded automatically. It is recommended
that at very least the "extmod" extension module be loaded. If it
isn't some commonly used server extensions (like the SHAPE extension)
will not be available.
INPUTDEVICE SECTION
The config file may have multiple InputDevice sections. There will
normally be at least two: one for the core (primary) keyboard, and one
of the core pointer. If either of these two is missing, a default con-
figuration for the missing ones will be used. Currently the default
configuration may not work as expected on all platforms.
InputDevice sections have the following format:
Section "InputDevice"
Identifier "name"
Driver "inputdriver"
options
...
EndSection
The Identifier and Driver entries are required in all InputDevice sec-
tions. All other entries are optional.
The Identifier entry specifies the unique name for this input device.
The Driver entry specifies the name of the driver to use for this input
device. When using the loadable server, the input driver module
"inputdriver" will be loaded for each active InputDevice section. An
InputDevice section is considered active if it is referenced by an
active ServerLayout section, if it is referenced by the -keyboard or
-pointer command line options, or if it is selected implicitly as the
core pointer or keyboard device in the absence of such explicit refer-
ences. The most commonly used input drivers are "keyboard" and
"mouse".
In the absence of an explicitly specified core input device, the first
InputDevice marked as CorePointer (or CoreKeyboard) is used. If there
is no match there, the first InputDevice that uses the "mouse" (or
"keyboard" or "kbd") driver is used. The final fallback is to use
built-in default configurations.
InputDevice sections recognise some driver-independent Options, which
are described here. See the individual input driver manual pages for a
description of the device-specific options.
Option "CorePointer"
When this is set, the input device is installed as the core
(primary) pointer device. There must be exactly one core
pointer. If this option is not set here, or in the ServerLayout
section, or from the -pointer command line option, then the
first input device that is capable of being used as a core
pointer will be selected as the core pointer. This option is
implicitly set when the obsolete Pointer section is used.
Option "CoreKeyboard"
When this is set, the input device is to be installed as the
core (primary) keyboard device. There must be exactly one core
keyboard. If this option is not set here, in the ServerLayout
section, or from the -keyboard command line option, then the
first input device that is capable of being used as a core key-
board will be selected as the core keyboard. This option is
implicitly set when the obsolete Keyboard section is used.
Option "AlwaysCore" "boolean"
Option "SendCoreEvents" "boolean"
Both of these options are equivalent, and when enabled cause the
input device to always report core events. This can be used,
for example, to allow an additional pointer device to generate
core pointer events (like moving the cursor, etc).
Option "HistorySize" "number"
Sets the motion history size. Default: 0.
Option "SendDragEvents" "boolean"
???
DEVICE SECTION
The config file may have multiple Device sections. There must be at
least one, for the video card being used.
Device sections have the following format:
Section "Device"
Identifier "name"
Driver "driver"
entries
...
EndSection
The Identifier and Driver entries are required in all Device sections.
All other entries are optional.
The Identifier entry specifies the unique name for this graphics
device. The Driver entry specifies the name of the driver to use for
this graphics device. When using the loadable server, the driver mod-
ule "driver" will be loaded for each active Device section. A Device
section is considered active if it is referenced by an active Screen
section.
Device sections recognise some driver-independent entries and Options,
which are described here. Not all drivers make use of these driver-
independent entries, and many of those that do don't require them to be
specified because the information is auto-detected. See the individual
graphics driver manual pages for further information about this, and
for a description of the device-specific options. Note that most of
the Options listed here (but not the other entries) may be specified in
the Screen section instead of here in the Device section.
BusID "bus-id"
This specifies the bus location of the graphics card. For
PCI/AGP cards, the bus-id string has the form
PCI:bus:device:function (e.g., "PCI:1:0:0" might be appropriate
for an AGP card). This field is usually optional in single-head
configurations when using the primary graphics card. In multi-
head configurations, or when using a secondary graphics card in
a single-head configuration, this entry is mandatory. Its main
purpose is to make an unambiguous connection between the device
section and the hardware it is representing. This information
can usually be found by running the XFree86 server with the
-scanpci command line option.
Screen number
This option is mandatory for cards where a single PCI entity can
drive more than one display (i.e., multiple CRTCs sharing a sin-
gle graphics accelerator and video memory). One Device section
is required for each head, and this parameter determines which
head each of the Device sections applies to. The legal values
of number range from 0 to one less than the total number of
heads per entity. Most drivers require that the primary screen
(0) be present.
Chipset "chipset"
This usually optional entry specifies the chipset used on the
graphics board. In most cases this entry is not required
because the drivers will probe the hardware to determine the
chipset type. Don't specify it unless the driver-specific docu-
mentation recommends that you do.
Ramdac "ramdac-type"
This optional entry specifies the type of RAMDAC used on the
graphics board. This is only used by a few of the drivers, and
in most cases it is not required because the drivers will probe
the hardware to determine the RAMDAC type where possible. Don't
specify it unless the driver-specific documentation recommends
that you do.
DacSpeed speed
DacSpeed speed-8 speed-16 speed-24 speed-32
This optional entry specifies the RAMDAC speed rating (which is
usually printed on the RAMDAC chip). The speed is in MHz. When
one value is given, it applies to all framebuffer pixel sizes.
When multiple values are give, they apply to the framebuffer
pixel sizes 8, 16, 24 and 32 respectively. This is not used by
many drivers, and only needs to be specified when the speed rat-
ing of the RAMDAC is different from the defaults built in to
driver, or when the driver can't auto-detect the correct
defaults. Don't specify it unless the driver-specific documen-
tation recommends that you do.
Clocks clock ...
specifies the pixel that are on your graphics board. The clocks
are in MHz, and may be specified as a floating point number.
The value is stored internally to the nearest kHz. The ordering
of the clocks is important. It must match the order in which
they are selected on the graphics board. Multiple Clocks lines
may be specified, and each is concatenated to form the list.
Most drivers do not use this entry, and it is only required for
some older boards with non-programmable clocks. Don't specify
this entry unless the driver-specific documentation explicitly
recommends that you do.
ClockChip "clockchip-type"
This optional entry is used to specify the clock chip type on
graphics boards which have a programmable clock generator. Only
a few XFree86 drivers support programmable clock chips. For
details, see the appropriate driver manual page.
VideoRam mem
This optional entry specifies the amount of video ram that is
installed on the graphics board. This is measured in kBytes. In
most cases this is not required because the XFree86 server
probes the graphics board to determine this quantity. The
driver-specific documentation should indicate when it might be
needed.
BiosBase baseaddress
This optional entry specifies the base address of the video BIOS
for the VGA board. This address is normally auto-detected, and
should only be specified if the driver-specific documentation
recommends it.
MemBase baseaddress
This optional entry specifies the memory base address of a
graphics board's linear frame buffer. This entry is not used by
many drivers, and it should only be specified if the driver-spe-
cific documentation recommends it.
IOBase baseaddress
This optional entry specifies the IO base address. This entry
is not used by many drivers, and it should only be specified if
the driver-specific documentation recommends it.
ChipID id
This optional entry specifies a numerical ID representing the
chip type. For PCI cards, it is usually the device ID. This
can be used to override the auto-detection, but that should only
be done when the driver-specific documentation recommends it.
ChipRev rev
This optional entry specifies the chip revision number. This
can be used to override the auto-detection, but that should only
be done when the driver-specific documentation recommends it.
TextClockFreq freq
This optional entry specifies the pixel clock frequency that is
used for the regular text mode. The frequency is specified in
MHz. This is rarely used.
IRQ interrupt-number
This optional entry allows an interrupt number to be specified.
Options
Option flags may be specified in the Device sections. These
include driver-specific options and driver-independent options.
The former are described in the driver-specific documentation.
Some of the latter are described below in the section about the
Screen section, and they may also be included here.
VIDEOADAPTOR SECTION
The config file may have multiple VideoAdaptor sections, which may be
referenced from Screen sections.
VideoAdaptor sections have the following format:
Section "VideoAdaptor"
Identifier "name"
entries
...
SubSection "Port"
entries
...
EndSubSection
...
EndSection
The only mandatory entry in a VideoAdaptor section is the Identifier.
Other entries include:
VendorName "vendor"
This optional entry specifies the video adaptor's manufacturer.
BoardName "model"
This optional entry specifies the video adaptor's model name.
Options
may be specified in the VideoAdaptor section.
The Port SubSections provide information about video adaptor ports.
Each of these may contain an Identifier entry and Options.
MONITOR SECTION
The config file may have multiple Monitor sections. There should nor-
mally be at least one, for the monitor being used, but a default con-
figuration will be created when one isn't specified.
Monitor sections have the following format:
Section "Monitor"
Identifier "name"
entries
...
EndSection
The only mandatory entry in a Monitor section is the Identifier entry.
The Identifier entry specifies the unique name for this monitor. The
Monitor section provides information about the specifications of the
monitor, monitor-specific Options, and information about the video
modes to use with the monitor. Specifying video modes is optional
because the server now has a built-in list of VESA standard modes.
When modes are specified explicitly in the Monitor section (with the
Modes, ModeLine, or UseModes keywords), built-in modes with the same
names are not included. Built-in modes with different names are, how-
ever, still implicitly included.
The entries that may be used in Monitor sections are described below.
VendorName "vendor"
This optional entry specifies the monitor's manufacturer.
ModelName "model"
This optional entry specifies the monitor's model.
HorizSync horizsync-range
gives the range(s) of horizontal sync frequencies supported by
the monitor. horizsync-range may be a comma separated list of
either discrete values or ranges of values. A range of values
is two values separated by a dash. By default the values are in
units of kHz. They may be specified in MHz or Hz if MHz or Hz
is added to the end of the line. The data given here is used by
the XFree86 server to determine if video modes are within the
specifications of the monitor. This information should be
available in the monitor's handbook. If this entry is omitted,
a default range of 28-33kHz is used.
VertRefresh vertrefresh-range
gives the range(s) of vertical refresh frequencies supported by
the monitor. vertrefresh-range may be a comma separated list of
either discrete values or ranges of values. A range of values
is two values separated by a dash. By default the values are in
units of Hz. They may be specified in MHz or kHz if MHz or kHz
is added to the end of the line. The data given here is used by
the XFree86 server to determine if video modes are within the
specifications of the monitor. This information should be
available in the monitor's handbook. If this entry is omitted,
a default range of 43-72Hz is used.
DisplaySize width height
This optional entry gives the width and height, in millimetres,
of the picture area of the monitor. If given this is used to
calculate the horizontal and vertical pitch (DPI) of the screen.
Gamma gamma-value
Gamma red-gamma green-gamma blue-gamma
This is an optional entry that can be used to specify the gamma
correction for the monitor. It may be specified as either a
single value or as three separate RGB values. The values should
be in the range 0.1 to 10.0, and the default is 1.0. Not all
drivers are capable of using this information.
UseModes "modesection-id"
Include the set of modes listed in the Modes section called mod-
esection-id. This make all of the modes defined in that section
available for use by this monitor.
Mode "name"
This is an optional multi-line entry that can be used to provide
definitions for video modes for the monitor. In most cases this
isn't necessary because the built-in set of VESA standard modes
will be sufficient. The Mode keyword indicates the start of a
multi-line video mode description. The mode description is ter-
minated with the EndMode keyword. The mode description consists
of the following entries:
DotClock clock
is the dot (pixel) clock rate to be used for the mode.
HTimings hdisp hsyncstart hsyncend htotal
specifies the horizontal timings for the mode.
VTimings vdisp vsyncstart vsyncend vtotal
specifies the vertical timings for the mode.
Flags "flag" ...
specifies an optional set of mode flags, each of which is a
separate string in double quotes. "Interlace" indicates
that the mode is interlaced. "DoubleScan" indicates a mode
where each scanline is doubled. "+HSync" and "-HSync" can
be used to select the polarity of the HSync signal.
"+VSync" and "-VSync" can be used to select the polarity of
the VSync signal. "Composite" can be used to specify com-
posite sync on hardware where this is supported. Addition-
ally, on some hardware, "+CSync" and "-CSync" may be used to
select the composite sync polarity.
HSkew hskew
specifies the number of pixels (towards the right edge of
the screen) by which the display enable signal is to be
skewed. Not all drivers use this information. This option
might become necessary to override the default value sup-
plied by the server (if any). "Roving" horizontal lines
indicate this value needs to be increased. If the last few
pixels on a scan line appear on the left of the screen, this
value should be decreased.
VScan vscan
specifies the number of times each scanline is painted on
the screen. Not all drivers use this information. Values
less than 1 are treated as 1, which is the default. Gener-
ally, the "DoubleScan" Flag mentioned above doubles this
value.
ModeLine "name" mode-description
This entry is a more compact version of the Mode entry, and it
also can be used to specify video modes for the monitor. is a
single line format for specifying video modes. In most cases
this isn't necessary because the built-in set of VESA standard
modes will be sufficient.
The mode-description is in four sections, the first three of
which are mandatory. The first is the dot (pixel) clock. This
is a single number specifying the pixel clock rate for the mode
in MHz. The second section is a list of four numbers specifying
the horizontal timings. These numbers are the hdisp, hsync-
start, hsyncend, and htotal values. The third section is a list
of four numbers specifying the vertical timings. These numbers
are the vdisp, vsyncstart, vsyncend, and vtotal values. The
final section is a list of flags specifying other characteris-
tics of the mode. Interlace indicates that the mode is inter-
laced. DoubleScan indicates a mode where each scanline is dou-
bled. +HSync and -HSync can be used to select the polarity of
the HSync signal. +VSync and -VSync can be used to select the
polarity of the VSync signal. Composite can be used to specify
composite sync on hardware where this is supported. Addition-
ally, on some hardware, +CSync and -CSync may be used to select
the composite sync polarity. The HSkew and VScan options men-
tioned above in the Modes entry description can also be used
here.
Option "DPMS" "boolean"
Set whether DPMS is enabled for the monitor. The default is
taken from the monitor's DDC/EDID information if available, or
false if not.
Option "TargetRefresh" "refresh"
Sets a target refresh rate to use for the monitor. If the moni-
tor has valid modes with a refresh rate greater or equal to this
value, those with a lower refresh rate will not be considered
when determining the default resolution to use. This is
improves the default resolution selection when none is specified
explicitly. Default: TargetRefresh not used.
Option "SyncOnGreen" "boolean"
Set whether sync-on-green should be enabled. The availability
of this option is driver-specific. Default: false.
Option "PreferredMode" "XresxYres"
Sets a preferred resolution to use for the default mode. By
default the preferred mode resolution is taken from the DDC/EDID
data if it is available and if it is provides a default mode
preference. This is typically true for flat panel displays,
which have a native/preferred resolution. This option is not
used of the UsePreferredMode option is false.
Option "UsePreferredMode" "boolean"
Controls whether or not a preferred mode, either detected from
the monitor's DDC/EDID data or provided explicitly with the Pre-
ferredMode option, is used. Default: true.
Options
Additional Option flags, including driver-specific options, may
be included in Monitor sections.
MODES SECTION
The config file may have multiple Modes sections, or none. These sec-
tions provide a way of defining sets of video modes independently of
the Monitor sections. Monitor sections may include the definitions
provided in these sections by using the UseModes keyword. In most
cases the Modes sections are not necessary because the built-in set of
VESA standard modes will be sufficient.
Modes sections have the following format:
Section "Modes"
Identifier "name"
entries
...
EndSection
The Identifier entry specifies the unique name for this set of mode
descriptions. The other entries permitted in Modes sections are the
Mode and ModeLine entries that are described above in the Monitor sec-
tion, as well as Options.
SCREEN SECTION
The config file may have multiple Screen sections. There must be at
least one, for the "screen" being used. A "screen" represents the
binding of a graphics device (Device section) and one or more monitors
(Monitor sections). A Screen section is considered "active" if it is
referenced by an active ServerLayout section or by the -screen command
line option. If neither of those is present, the first Screen section
found in the config file is considered the active one.
Screen sections have the following format:
Section "Screen"
Identifier "name"
Device "devid"
Monitor "monid"
entries
...
SubSection "Display"
entries
...
EndSubSection
...
EndSection
The Identifier and Device entries are mandatory. All others are
optional.
The Identifier entry specifies the unique name for this screen. The
Screen section provides information specific to the whole screen,
including screen-specific Options. In multi-head configurations, there
will be multiple active Screen sections, one for each head. The
entries available for this section are:
Device "device-id"
This mandatory entry specifies the Device section to be used for
this screen. This is what ties a specific graphics card to a
screen. The device-id must match the Identifier of a Device
section in the config file.
Monitor monitor-num "monitor-id"
One of these entries may be given for each monitor associated
with this screen. In the absence of these entries, at least one
default monitor will be created for the screen. The monitor-id
field is mandatory, and specifies the Monitor section being ref-
erenced. The monitor-num field is required when more than one
monitor is being associated with the screen. Each referenced
monitor should be given a unique monitor number. This monitor
number may be given special significance by the driver, and it
is also used to identify which Display subsection(s) are associ-
ated with the screen/monitor. If this field is omitted in a
multiple-monitor configuration, default values will be assigned.
This is not recommended, and this behaviour may change in future
revisions.
If a Monitor name is not specified, a default configuration is
used. Currently the default configuration may not function as
expected on all platforms.
VideoAdaptor "xv-id"
specifies an optional Xv video adaptor description to be used
with this screen.
DefaultDepth depth
specifies which color depth the server should use by default.
The -depth command line option can be used to override this. If
neither is specified, the default depth is driver-specific, but
in most cases is 8.
DefaultFbBpp bpp
specifies which framebuffer layout to use by default. The
-fbbpp command line option can be used to override this. In
most cases the driver will chose the best default value for
this. The only case where there is even a choice in this value
is for depth 24, where some hardware supports both a packed 24
bit framebuffer layout and a sparse 32 bit framebuffer layout.
Options
Various Option flags may be specified in the Screen section.
Some are driver-specific and are described in the driver docu-
mentation. Others are driver-independent, and will eventually
be described here.
Option "Accel"
Enables XAA (X Acceleration Architecture), a mechanism that
makes video cards' 2D hardware acceleration available to the
XFree86 server. This option is on by default, but it may be
necessary to turn it off if there are bugs in the driver. There
are many options to disable specific accelerated operations,
listed below. Note that disabling an operation will have no
effect if the operation is not accelerated (whether due to lack
of support in the hardware or in the driver).
Option "BiosLocation" "address"
Set the location of the BIOS for the Int10 module. One may
select a BIOS of another card for posting or the legacy V_BIOS
range located at 0xc0000 or an alternative address (BUS_ISA).
This is only useful under very special circumstances and should
be used with extreme care.
Option "InitPrimary" "boolean"
Use the Int10 module to initialize the primary graphics card.
Normally, only secondary cards are soft-booted using the Int10
module, as the primary card has already been initialized by the
BIOS at boot time. Default: false.
Option "NoInt10" "boolean"
Disables the Int10 module, a module that uses the int10 call to
the BIOS of the graphics card to initialize it. Default: false.
Option "NoMTRR"
Disables MTRR (Memory Type Range Register) support, a feature of
modern processors which can improve video performance by a fac-
tor of up to 2.5. Some hardware has buggy MTRR support, and
some video drivers have been known to exhibit problems when
MTRR's are used.
Option "XaaNoCPUToScreenColorExpandFill"
Disables accelerated rectangular expansion blits from source
patterns stored in system memory (using a memory-mapped aper-
ture).
Option "XaaNoColor8x8PatternFillRect"
Disables accelerated fills of a rectangular region with a full-
color pattern.
Option "XaaNoColor8x8PatternFillTrap"
Disables accelerated fills of a trapezoidal region with a full-
color pattern.
Option "XaaNoDashedBresenhamLine"
Disables accelerated dashed Bresenham line draws.
Option "XaaNoDashedTwoPointLine"
Disables accelerated dashed line draws between two arbitrary
points.
Option "XaaNoImageWriteRect"
Disables accelerated transfers of full-color rectangular pat-
terns from system memory to video memory (using a memory-mapped
aperture).
Option "XaaNoMono8x8PatternFillRect"
Disables accelerated fills of a rectangular region with a mono-
chrome pattern.
Option "XaaNoMono8x8PatternFillTrap"
Disables accelerated fills of a trapezoidal region with a mono-
chrome pattern.
Option "XaaNoOffscreenPixmaps"
Disables accelerated draws into pixmaps stored in offscreen
video memory.
Option "XaaNoPixmapCache"
Disables caching of patterns in offscreen video memory.
Option "XaaNoScanlineCPUToScreenColorExpandFill"
Disables accelerated rectangular expansion blits from source
patterns stored in system memory (one scan line at a time).
Option "XaaNoScanlineImageWriteRect"
Disables accelerated transfers of full-color rectangular pat-
terns from system memory to video memory (one scan line at a
time).
Option "XaaNoScreenToScreenColorExpandFill"
Disables accelerated rectangular expansion blits from source
patterns stored in offscreen video memory.
Option "XaaNoScreenToScreenCopy"
Disables accelerated copies of rectangular regions from one part
of video memory to another part of video memory.
Option "XaaNoSolidBresenhamLine"
Disables accelerated solid Bresenham line draws.
Option "XaaNoSolidFillRect"
Disables accelerated solid-color fills of rectangles.
Option "XaaNoSolidFillTrap"
Disables accelerated solid-color fills of Bresenham trapezoids.
Option "XaaNoSolidHorVertLine"
Disables accelerated solid horizontal and vertical line draws.
Option "XaaNoSolidTwoPointLine"
Disables accelerated solid line draws between two arbitrary
points.
Each Screen section may optionally contain one or more Display subsec-
tions. Those subsections provide depth, fbbpp and monitor specific
configuration information, and the ones chosen depend on the depth
and/or fbbpp that is being used for the screen, as well as the monitor
number(s) in multi-monitor configurations. The Display subsection for-
mat is described in the section below.
DISPLAY SUBSECTION
Each Screen section may have multiple Display subsections. The
"active" Display subsections are the first for each monitor number that
match the depth and/or fbbpp values being used, or failing that, the
first for each monitor number that has neither a depth or fbbpp value
specified. Display subsections with no monitor number specified are
used for single monitor per screen configurations. The Display subsec-
tions are optional. When there isn't one that matches the monitor num-
ber and/or depth and/or fbbpp values being used, all the parameters
that can be specified here fall back to their defaults.
Display subsections have the following format:
SubSection "Display"
Monitor monitor-num
Depth depth
entries
...
EndSubSection
None of the entries in a Display subsection are mandatory.
Monitor monitor-num
This entry specifies which Monitor entry of the Screen section
that this Display subsection applies to. This number should
match the monitor number of one of the Monitor references in the
Screen screen. If it doesn't match, then this Display subsec-
tion will be ignored. If this entry is omitted, it is applied
to single-monitor configurations. For multi-monitor configura-
tions, the driver may also use information in this subsection
for screen-wide parameters. Not all of the parameters in this
subsection make sense on a per-monitor basis. Which get used
and how they get used is currently up to the driver. Entries
that are relevant to multi-monitor configurations include Modes,
Virtual, ViewPort, and Options.
Depth depth
This entry specifies what colour depth the Display subsection is
to be used for. This entry is usually specified, but it may be
omitted to create a match-all Display subsection or when wishing
to match only against the FbBpp parameter. The range of depth
values that are allowed depends on the driver. Most driver sup-
port 8, 15, 16 and 24. Some also support 1 and/or 4, and some
may support other values (like 30). Note: depth means the num-
ber of bits in a pixel that are actually used to determine the
pixel colour. 32 is not a valid depth value. Most hardware
that uses 32 bits per pixel only uses 24 of them to hold the
colour information, which means that the colour depth is 24, not
32.
FbBpp bpp
This entry specifies the framebuffer format this Display subsec-
tion is to be used for. This entry is only needed when provid-
ing depth 24 configurations that allow a choice between a 24 bpp
packed framebuffer format and a 32bpp sparse framebuffer format.
In most cases this entry should not be used.
Weight red-weight green-weight blue-weight
This optional entry specifies the relative RGB weighting to be
used for a screen is being used at depth 16 for drivers that
allow multiple formats. This may also be specified from the
command line with the -weight option (see XFree86(1)).
Virtual xdim ydim
This optional entry specifies the virtual screen resolution to
be used. xdim must be a multiple of either 8 or 16 for most
drivers, and a multiple of 32 when running in monochrome mode.
The given value will be rounded down if this is not the case.
Video modes which are too large for the specified virtual size
will be rejected. If this entry is not present, the virtual
screen resolution will be set to accommodate all the valid video
modes given in the Modes entry. Some drivers/hardware combina-
tions do not support virtual screens. Refer to the appropriate
driver-specific documentation for details.
ViewPort x0 y0
This optional entry sets the upper left corner of the initial
display. This is only relevant when the virtual screen resolu-
tion is different from the resolution of the initial video mode.
If this entry is not given, then the initial display will be
centered in the virtual display area.
Modes "mode-name" ...
This optional entry specifies the list of video modes to use.
Each mode-name specified must be in double quotes. They must
correspond to those specified or referenced in the appropriate
Monitor section (including implicitly referenced built-in VESA
standard modes). The server will delete modes from this list
which don't satisfy various requirements. The first valid mode
in this list will be the default display mode for startup. The
list of valid modes is converted internally into a circular
list. It is possible to switch to the next mode with
Ctrl+Alt+Keypad-Plus and to the previous mode with Ctrl+Alt+Key-
pad-Minus. When this entry is omitted, the valid modes refer-
enced by the appropriate Monitor section will be used. If the
Monitor section contains no modes, then the selection will be
taken from the built-in VESA standard modes.
Visual "visual-name"
This optional entry sets the default root visual type. This may
also be specified from the command line (see the Xserver(1) man
page). The visual types available for depth 8 are (default is
PseudoColor):
StaticGray
GrayScale
StaticColor
PseudoColor
TrueColor
DirectColor
The visual type available for the depths 15, 16 and 24 are
(default is TrueColor):
TrueColor
DirectColor
Not all drivers support DirectColor at these depths.
The visual types available for the depth 4 are (default is Stat-
icColor):
StaticGray
GrayScale
StaticColor
PseudoColor
The visual type available for the depth 1 (monochrome) is Stat-
icGray.
Black red green blue
This optional entry allows the "black" colour to be specified.
This is only supported at depth 1. The default is black.
White red green blue
This optional entry allows the "white" colour to be specified.
This is only supported at depth 1. The default is white.
Options
Option flags may be specified in the Display subsections. These
may include driver-specific options and driver-independent
options. The former are described in the driver-specific docu-
mentation. Some of the latter are described above in the sec-
tion about the Screen section, and they may also be included
here.
SERVERLAYOUT SECTION
The config file may have multiple ServerLayout sections. A "server
layout" represents the binding of one or more screens (Screen sections)
and one or more input devices (InputDevice sections) to form a complete
configuration. In multi-head configurations, it also specifies the
relative layout of the heads. A ServerLayout section is considered
"active" if it is referenced by the -layout command line option or by
an Option "DefaultServerLayout" entry in the ServerFlags section (the
former takes precedence over the latter). If those options are not
used, the first ServerLayout section found in the config file is con-
sidered the active one. If no ServerLayout sections are present, the
single active screen and two active (core) input devices are selected
as described in the relevant sections above.
ServerLayout sections have the following format:
Section "ServerLayout"
Identifier "name"
Screen "screen-id"
...
InputDevice "idev-id"
...
options
...
EndSection
Each ServerLayout section must have an Identifier entry and at least
one Screen entry.
The Identifier entry specifies the unique name for this server layout.
The ServerLayout section provides information specific to the whole
session, including session-specific Options. The ServerFlags options
(described above) may be specified here, and ones given here override
those given in the ServerFlags section.
The entries that may be used in this section are described here.
Screen screen-num "screen-id" position-information
One of these entries must be given for each screen being used in
a session. The screen-id field is mandatory, and specifies the
Screen section being referenced. The screen-num field is
optional, and may be used to specify the screen number in multi-
head configurations. When this field is omitted, the screens
will be numbered in the order that they are listed in. The num-
bering starts from 0, and must be consecutive. The optional
position-information field describes the way multiple screens
are positioned. When this information is not provided, the
positioning of the screen defaults to Absolute 0 0. There are a
number of different ways that this information can be provided:
x y
Absolute x y
These both specify that the upper left corner's coordinates
are (x,y). The Absolute keyword is optional. Some older
versions of XFree86 (4.2 and earlier) don't recognise the
Absolute keyword, so it's safest to just specify the coordi-
nates without it.
RightOf "screen-id"
LeftOf "screen-id"
Above "screen-id"
Below "screen-id"
Relative "screen-id" x y
These give the screen's location relative to another screen.
The first four position the screen immediately to the right,
left, above or below the other screen. When positioning to
the right or left, the top edges are aligned. When posi-
tioning above or below, the left edges are aligned. The
Relative form specifies the offset of the screen's origin
(upper left corner) relative to the origin of another
screen.
InputDevice "idev-id" "option" ...
One of these entries should be given for each input device being
used in a session. Normally at least two are required, one each
for the core pointer and keyboard devices. If either of those
is missing, suitable InputDevice entries are searched for using
the method described above in the INPUTDEVICE section. The
idev-id field is mandatory, and specifies the name of the Input-
Device section being referenced. Multiple option fields may be
specified, each in double quotes. The options permitted here
are any that may also be given in the InputDevice sections.
Normally only session-specific input device options would be
used here. The most commonly used options are:
"CorePointer"
"CoreKeyboard"
"SendCoreEvents"
and the first two should normally be used to indicate the core
pointer and core keyboard devices respectively.
Options
Any option permitted in the ServerFlags section may also be
specified here. When the same option appears in both places,
the value given here overrides the one given in the ServerFlags
section.
Here is an example of a ServerLayout section for a dual headed configu-
ration with two mice:
Section "ServerLayout"
Identifier "Layout 1"
Screen "MGA 1"
Screen "MGA 2" RightOf "MGA 1"
InputDevice "Keyboard 1" "CoreKeyboard"
InputDevice "Mouse 1" "CorePointer"
InputDevice "Mouse 2" "SendCoreEvents"
Option "BlankTime" "5"
EndSection
DRI SECTION
This optional section is used to provide some information for the
Direct Rendering Infrastructure.
Identifier "name"
specifies an optional identifying name for the DRI section.
Group "group-name"
Group group-id
specifies the group ownership for the DRI device nodes. It may
be specified as a group name or as a numerical group ID.
Mode mode
specifies the numerical permissions for the DRI device nodes.
Buffers count size
specifies buffers.
Options
Option flags may be specified in DRI sections.
VENDOR SECTION
The optional Vendor section may be used to provide vendor-specific con-
figuration information. Multiple Vendor sections may be present, and
they may contain the following entries:
Identifier "name"
specifies an identifying name for the Vendor section.
VendorName "vendor-name"
specifies the vendor name.
Options
may be specified in the Vendor sections.
In addition to these entries, there may be named SubSections, each of
which may contain an Identifier entry and Option entries.
FILES
For an example of an XF86Config file, see the file installed as
/usr/X11R6/lib/X11/XF86Config.eg.
SEE ALSO
X(7), Xserver(1), XFree86(1), apm(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), nv(4), r128(4), rendition(4), savage(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),
README <http://www.xfree86.org/current/README.html>,
RELNOTES <http://www.xfree86.org/current/RELNOTES.html>,
README.mouse <http://www.xfree86.org/current/mouse.html>,
README.DRI <http://www.xfree86.org/current/DRI.html>,
Install <http://www.xfree86.org/current/Install.html>.
AUTHORS
This manual page was largely rewritten for XFree86 4.0 by David Dawes
<dawes@xfree86.org>.
4.5.0 XFree86 XF86Config(5)
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