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xrandr(1)                                                            xrandr(1)


       xrandr - primitive command line interface to RandR extension


       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-
       der_bottom]]]] [--scale xxy]  [--transform  a,b,c,d,e,f,g,h,i]  [--pri-
       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

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


       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.

              Causes xrandr to be more verbose. When used with -q (or  without
              other  options),  xrandr will display more information about the
              server state. When used along with options that reconfigure  the
              system, progress will be reported while executing the configura-
              tion changes.

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

              Performs all the actions specified except that  no  changes  are

       -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

RandR version 1.3 options

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

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

              Don't define a primary output.

       Per-output options

       --panning                              widthxheight[+x+y[/track_widthx-
              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 matrix multiplied by a coordinate vector of a
              pixel of the output (extended to 3 values) gives the approximate
              coordinate vector of a pixel in the graphic buffer. Typically, a
              and e corresponds to the scaling on the X and Y axes,  c  and  f
              corresponds  to  the  tranlastion on those axes, and g, h, and i
              are respectively 0, 0 and 1. It also allows to express  a  rota-
              tion of an angle T with:
                     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 version of the --transform

                     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: hdisp hsyncstart
              hsyncend htotal vdisp vsyncstart vsyncend  vtotal  flags.  flags
              can  be  zero  or more of +HSync, -HSync, +VSync, -VSync, Inter-
              lace, DoubleScan, CSync, +CSync, -CSync. Several tools permit 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

              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 and  that  switching
              an  output to another crtc doesn't change the crtc gamma correc-
              tions at all.

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.


       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

       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


       Xrandr(3), cvt(1)


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

X Version 11                     xrandr 1.3.0                        xrandr(1)

Mac OS X 10.6 X11 - Generated Sun Mar 7 12:29:01 CST 2010
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