xrandr


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

       -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-
              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.

              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 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
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