xrandr(1) - phpMan

XRANDR(1) 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 1.2 options
[--prop] [--fb widthxheight] [--fbmm widthxheight] [--dpi dpi] [--newmode name mode]
[--rmmode name] [--addmode output name] [--delmode output 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]
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 preferred 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 mutiple --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. 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.

-d, -display name
This option selects the X display to use. Note this refers to the X screen abstrac-
tion, 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 1.2 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 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 speci-
fied 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: 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 preferred
mode (or, something close to 96dpi if they have no preferred mode). For discon-
nected 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 dis-
able 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 multi-
ple 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 rota-
tion.

--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) 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 nor-
mal 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.

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 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