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]  [--current]  [--noprimary]  [--panning
       widthxheight[+x+y[/track_widthxtrack_height+track_x+track_y[/bor-
       der_left/border_top/border_right/border_bottom]]]]    [--scale     xxy]
       [--scale-from wxh] [--transform a,b,c,d,e,f,g,h,i] [--primary] [--prop]
       [--fb widthxheight] [--fbmm widthxheight] [--dpi dpi]  [--newmode  name
       mode]  [--rmmode  name] [--addmode output name] [--delmode output name]
       [--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] [-o  orientation]  [-s  size]
       [-r   rate]   [-x]  [-y]  [--listproviders]  [--setprovideroutputsource
       provider source] [--setprovideroffloadsink provider sink]

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 modes 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 1.4 options
       Options  for  RandR 1.4 are used as a superset of the options for RandR
       1.3.

       --listproviders
              Report information about the providers available.

       --setprovideroutputsource provider source
              Set source as the source of display output images for  provider.
              This  is  only  possible  if source and provider have the Source
              Output and Sink Output capabilities, respectively.  If source is
              0x0,  then  provider  is  disconnected  from  its current output
              source.

       --setprovideroffloadsink provider sink
              Set provider as a render offload device for sink.  This is  only
              possible  if  provider and sink have the Source Offload and Sink
              Offload  capabilities,  respectively.   If  sink  is  0x0,  then
              provider is disconnected from its current render offload sink.

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.

       --scale-from wxh
              Specifies the size in pixels of the area of the  framebuffer  to
              be displayed on this output.  This option is actually a shortcut
              version 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 first 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) comma-separated list of decimal or hexadec-
              imal  (with a leading 0x) values.  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 1.4.2                        XRANDR(1)
