XRANDR(1)		    General Commands Manual		     XRANDR(1)



NAME
       xrandr - primitive command line interface to RandR extension

SYNOPSIS
       xrandr  [-help]	 [-display  display]  [-q] [-v] [--verbose] [--dryrun]
       [--screen snum] [--q1] [--q12]
       RandR version 1.3 options
       [--current] [--noprimary]
       Per-output options
       [--panning			      widthxheight[+x+y[/track_widthx-
       track_height+track_x+track_y[/border_left/border_top/border_right/bor-
       der_bottom]]]] [--scale xxy]  [--transform  a,b,c,d,e,f,g,h,i]  [--pri-
       mary]
       RandR version 1.2 options
       [--prop]	 [--fb widthxheight] [--fbmm widthxheight] [--dpi dpi] [--new-
       mode name mode] [--rmmode name] [--addmode output name] [--delmode out-
       put name]
       Per-output options
       [--output  output]  [--auto]  [--mode  mode]  [--preferred] [--pos xxy]
       [--rate rate] [--reflect reflection] [--rotate orientation]  [--left-of
       output]	[--right-of output] [--above output] [--below output] [--same-
       as output]  [--set  property  value]  [--off]  [--crtc  crtc]  [--gamma
       red:green:blue] [--brightness brightness]

       RandR version 1.0 and version 1.1 options
       [-o orientation] [-s size] [-r rate] [-x] [-y]

DESCRIPTION
       Xrandr  is  used	 to set the size, orientation and/or reflection of the
       outputs for a screen. It can also set the screen size.

       If invoked without any option, it will dump the state of	 the  outputs,
       showing	the existing modes for each of them, with a '+' after the pre-
       ferred mode and a '*' after the current mode.

       There are a few global options. Other options modify  the  last	output
       that  is	 specified in earlier parameters in the command line. Multiple
       outputs may be modified at the same time by passing  multiple  --output
       options followed immediately by their corresponding modifying options.

       -help  Print out a summary of the usage and exit.

       -v, --version
	      Print out the RandR version reported by the X server and exit.

       --verbose
	      Causes  xrandr to be more verbose. When used with -q (or without
	      other options), xrandr will display more information  about  the
	      server state. Please note that the gamma and brightness informa-
	      tions are only approximations  of	 the  complete	color  profile
	      stored  in  the server. When used along with options that recon-
	      figure the system, progress will be reported while executing the
	      configuration changes.

       -q, --query
	      When  this  option  is present, or when no configuration changes
	      are requested, xrandr will display the current state of the sys-
	      tem.

       --dryrun
	      Performs	all  the  actions specified except that no changes are
	      made.

       --nograb
	      Apply the modifications without grabbing the screen.  It	avoids
	      to  block other applications during the update but it might also
	      cause some applications that detect screen resize to receive old
	      values.

       -d, -display name
	      This  option  selects  the X display to use. Note this refers to
	      the X screen abstraction, not the monitor (or output).

       --screen snum
	      This option selects which screen to manipulate. Note this refers
	      to the X screen abstraction, not the monitor (or output).

       --q1   Forces  the  usage  of the RandR version 1.1 protocol, even if a
	      higher version is available.

       --q12  Forces the usage of the RandR version 1.2 protocol, even if  the
	      display  does  not report it as supported or a higher version is
	      available.

RandR version 1.3 options
       Options for RandR 1.3 are used as a superset of the options  for	 RandR
       1.2.

       --current
	      Return  the  current  screen  configuration, without polling for
	      hardware changes.

       --noprimary
	      Don't define a primary output.

       Per-output options

       --panning			      widthxheight[+x+y[/track_widthx-
       track_height+track_x+track_y[/border_left/border_top/border_right/bor-
       der_bottom]]]
	      This option sets the panning parameters.	As soon as panning  is
	      enabled,	the  CRTC position can change with every pointer move.
	      The first four parameters specify the total  panning  area,  the
	      next  four the pointer tracking area (which defaults to the same
	      area). The last four parameters specify the border  and  default
	      to  0.  A	 width	or  height set to zero disables panning on the
	      according axis. You typically have to set the screen  size  with
	      --fb simultaneously.

       --transform a,b,c,d,e,f,g,h,i
	      Specifies	 a transformation matrix to apply on the output. Auto-
	      matically a bilinear filter is selected.	The mathematical  form
	      corresponds to:
		     a b c
		     d e f
		     g h i
	      The  transformation  is  based  on  homogeneous coordinates. The
	      matrix multiplied by the coordinate vector of  a	pixel  of  the
	      output gives the transformed coordinate vector of a pixel in the
	      graphic buffer.  More precisely, the vector (x y) of the	output
	      pixel  is	 extended to 3 values (x y w), with 1 as the w coordi-
	      nate and multiplied against the matrix. The final device coordi-
	      nates  of	 the  pixel  are  then	calculated  with the so-called
	      homogenic division by the transformed w  coordinate.   In	 other
	      words,  the  device coordinates (x' y') of the transformed pixel
	      are:
		     x' = (ax + by + c) / w'   and
		     y' = (dx + ey + f) / w'   ,
		     with  w' = (gx + hy + i)  .
	      Typically, a and e corresponds to the scaling on	the  X	and  Y
	      axes,  c and f corresponds to the translation on those axes, and
	      g, h, and i are respectively 0, 0 and 1. The matrix can also  be
	      used  to	express	 more complex transformations such as keystone
	      correction, or rotation.	For a rotation of  an  angle  T,  this
	      formula can be used:
		     cos T  -sin T   0
		     sin T   cos T   0
		      0	      0	     1
	      As a special argument, instead of passing a matrix, one can pass
	      the string none, in which case the default values	 are  used  (a
	      unit matrix without filter).

       --scale xxy
	      Changes the dimensions of the output picture. Values superior to
	      1 will lead to a compressed screen (screen dimension bigger than
	      the dimension of the output mode), and values below 1 leads to a
	      zoom in on the output. This option is actually a	shortcut  ver-
	      sion of the --transform option.

       --primary
	      Set  the output as primary.  It will be sorted first in Xinerama
	      and RANDR geometry requests.

RandR version 1.2 options
       These options are only available for X server supporting RandR  version
       1.2 or newer.

       --prop, --properties
	      This  option causes xrandr to display the contents of properties
	      for each output. --verbose also enables --prop.

       --fb widthxheight
	      Reconfigures the screen to the specified	size.  All  configured
	      monitors must fit within this size. When this option is not pro-
	      vided, xrandr computes the smallest screen size that  will  hold
	      the  set	of  configured	outputs; this option provides a way to
	      override that behaviour.

       --fbmm widthxheight
	      Sets the reported values for the physical size  of  the  screen.
	      Normally,	 xrandr	 resets	 the  reported physical size values to
	      keep the DPI constant.  This overrides that computation.

       --dpi dpi
	      This also sets the reported physical size values of the  screen,
	      it uses the specified DPI value to compute an appropriate physi-
	      cal size using whatever pixel size will be set.

       --newmode name mode
	      New modelines can be added to the	 server	 and  then  associated
	      with  outputs.   This option does the former. The mode is speci-
	      fied using the ModeLine syntax for xorg.conf: clock hdisp hsync-
	      start  hsyncend  htotal  vdisp vsyncstart vsyncend vtotal flags.
	      flags can be zero or more of  +HSync,  -HSync,  +VSync,  -VSync,
	      Interlace, DoubleScan, CSync, +CSync, -CSync. Several tools per-
	      mit to compute the usual modeline	 from  a  height,  width,  and
	      refresh rate, for instance you can use cvt.

       --rmmode name
	      This removes a mode from the server if it is otherwise unused.

       --addmode output name
	      Add a mode to the set of valid modes for an output.

       --delmode output name
	      Remove a mode from the set of valid modes for an output.

       Per-output options

       --output output
	      Selects  an  output  to  reconfigure. Use either the name of the
	      output or the XID.

       --auto For connected but disabled outputs, this will enable them	 using
	      their  preferred mode (or, something close to 96dpi if they have
	      no preferred mode). For disconnected but enabled	outputs,  this
	      will disable them.

       --mode mode
	      This selects a mode. Use either the name or the XID for mode

       --preferred
	      This  selects  the same mode as --auto, but it doesn't automati-
	      cally enable or disable the output.

       --pos xxy
	      Position the output within the screen using  pixel  coordinates.
	      In  case	reflection  or rotation is applied, the translation is
	      applied after the effects.

       --rate rate
	      This marks a preference for refresh rates close to the specified
	      value,  when multiple modes have the same name, this will select
	      the one with the nearest refresh rate.

       --reflect reflection
	      Reflection can be one of 'normal' 'x', 'y' or 'xy'. This	causes
	      the output contents to be reflected across the specified axes.

       --rotate rotation
	      Rotation	can be one of 'normal', 'left', 'right' or 'inverted'.
	      This causes the output contents to be rotated in	the  specified
	      direction. 'right' specifies a clockwise rotation of the picture
	      and 'left' specifies a counter-clockwise rotation.

       --left-of, --right-of, --above, --below, --same-as another-output
	      Use one of these options to position the output relative to  the
	      position	of  another  output.  This allows convenient tiling of
	      outputs within the screen.  The position is always computed rel-
	      ative  to	 the  new  position  of the other output, so it is not
	      valid to say --output a --left-of b --output b --left-of a.

       --set property value
	      Sets an output property. Integer properties may be specified  as
	      a	 valid (see --prop) decimal or hexadecimal (with a leading 0x)
	      value. Atom properties may be set to any of the valid atoms (see
	      --prop). String properties may be set to any value.

       --off  Disables the output.

       --crtc crtc
	      Uses the specified crtc (either as an index in the list of CRTCs
	      or XID).	In normal usage, this option is not required as xrandr
	      tries to make sensible choices about which crtc to use with each
	      output. When that fails for some reason, this option  can	 over-
	      ride the normal selection.

       --gamma red:green:blue
	      Set  the	specified floating point values as gamma correction on
	      the crtc currently attached to this output. Note that you cannot
	      get  two	different values for cloned outputs (i.e.: which share
	      the same crtc) and that switching	 an  output  to	 another  crtc
	      doesn't change the crtc gamma corrections at all.

       --brightness brightness
	      Multiply	the gamma values on the crtc currently attached to the
	      output to specified floating value. Useful for overly bright  or
	      overly  dim outputs.  However, this is a software only modifica-
	      tion, if your  hardware  has  support  to	 actually  change  the
	      brightness, you will probably prefer to use xbacklight.

RandR version 1.1 options
       These  options are available for X servers supporting RandR version 1.1
       or older. They are still valid for newer	 X  servers,  but  they	 don't
       interact sensibly with version 1.2 options on the same command line.

       -s, --size size-index or --size widthxheight
	      This  sets the screen size, either matching by size or using the
	      index into the list of available sizes.

       -r, --rate, --refresh rate
	      This sets the refresh rate closest to the specified value.

       -o, --orientation rotation
	      This specifies the orientation of the screen, and can be one  of
	      normal, inverted, left or right.

       -x     Reflect across the X axis.

       -y     Reflect across the Y axis.

EXAMPLES
       Sets  an output called LVDS to its preferred mode, and on its right put
       an output called VGA to preferred mode of a screen which has been phys-
       ically rotated clockwise:
	      xrandr  --output	LVDS --auto --rotate normal --pos 0x0 --output
	      VGA --auto --rotate left --right-of LVDS

       Forces to use a 1024x768 mode on an output called VGA:
	      xrandr --newmode "1024x768" 63.50	 1024 1072 1176 1328  768  771
	      775 798 -hsync +vsync
	      xrandr --addmode VGA 1024x768
	      xrandr --output VGA --mode 1024x768

       Enables panning on a 1600x768 desktop while displaying 1024x768 mode on
       an output called VGA:
	      xrandr --fb 1600x768  --output  VGA  --mode  1024x768  --panning
	      1600x0

       Have  one  small 1280x800 LVDS screen showing a small version of a huge
       3200x2000 desktop, and have a big VGA screen display the surrounding of
       the mouse at normal size.
	      xrandr --fb 3200x2000 --output LVDS --scale 2.5x2.5 --output VGA
	      --pos 0x0 --panning 3200x2000+0+0/3200x2000+0+0/64/64/64/64

       Displays the VGA output in trapezoid shape so that it is keystone  cor-
       rected when the projector is slightly above the screen:
	      xrandr	 --fb	  1024x768     --output	    VGA	   --transform
	      1.24,0.16,-124,0,1.24,0,0,0.000316,1

SEE ALSO
       Xrandr(3), cvt(1), xkeystone(1), xbacklight(1)

AUTHORS
       Keith Packard, Open Source Technology Center, Intel  Corporation.   and
       Jim Gettys, Cambridge Research Laboratory, HP Labs, HP.



X Version 11			 xrandr 1.3.5			     XRANDR(1)