xrandr - primitive command line interface to RandR extension
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[/border_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]
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
    preferred 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 informations are only
      approximations of the complete color profile stored in the server. When
      used along with options that reconfigure 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 system.
- --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.
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.
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_widthxtrack_height+track_x+track_y[/border_left/border_top/border_right/border_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. Automatically 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
  coordinate and multiplied against the matrix. The final device coordinates 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 version 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.
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 provided, 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 physical 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 specified using the
      ModeLine syntax for xorg.conf: clock hdisp hsyncstart 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 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
      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 automatically 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 relative 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 hexadecimal (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 override 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 modification, if your hardware has
      support to actually change the brightness, you will probably prefer to use
      xbacklight.
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 physically 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
    corrected 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
Xrandr(3), cvt(1), xkeystone(1), xbacklight(1)
Keith Packard, Open Source Technology Center, Intel Corporation. and Jim Gettys,
  Cambridge Research Laboratory, HP Labs, HP.