NAME
xrandr - primitive command line interface to RandR extension
SYNOPSIS
xrandr
[-help] [-display _d_i_s_p_l_a_y]
[-q] [-v]
[--verbose]
[--dryrun]
[--screen _s_n_u_m]
[--q1]
[--q12]
RandR version 1.3 options
[--current]
[--noprimary]
Per-output options
[--panning _w_i_d_t_hx_h_e_i_g_h_t[+_x+_y[/_t_r_a_c_k___w_i_d_t_hx_t_r_a_c_k___h_e_i_g_h_t+_t_r_a_c_k___x+_t_r_a_c_k___y[/_b_o_r_d_e_r___l_e_f_t/_b_o_r_d_e_r___t_o_p/_b_o_r_d_e_r___r_i_g_h_t/_b_o_r_d_e_r___b_o_t_t_o_m]]]]
[--scale _xx_y]
[--transform _a,_b,_c,_d,_e,_f,_g,_h,_i]
[--primary]
RandR version 1.2 options
[--prop]
[--fb _w_i_d_t_hx_h_e_i_g_h_t]
[--fbmm _w_i_d_t_hx_h_e_i_g_h_t]
[--dpi _d_p_i]
[--newmode _n_a_m_e _m_o_d_e]
[--rmmode _n_a_m_e]
[--addmode _o_u_t_p_u_t _n_a_m_e]
[--delmode _o_u_t_p_u_t _n_a_m_e]
Per-output options
[--output _o_u_t_p_u_t]
[--auto]
[--mode _m_o_d_e]
[--preferred]
[--pos _xx_y]
[--rate _r_a_t_e]
[--reflect _r_e_f_l_e_c_t_i_o_n]
[--rotate _o_r_i_e_n_t_a_t_i_o_n]
[--left-of _o_u_t_p_u_t]
[--right-of _o_u_t_p_u_t]
[--above _o_u_t_p_u_t]
[--below _o_u_t_p_u_t]
[--same-as _o_u_t_p_u_t]
[--set _p_r_o_p_e_r_t_y _v_a_l_u_e]
[--off]
[--crtc _c_r_t_c]
[--gamma _r_e_d:_g_r_e_e_n:_b_l_u_e]
RandR version 1.0 and version 1.1 options
[-o _o_r_i_e_n_t_a_t_i_o_n]
[-s _s_i_z_e]
[-r _r_a_t_e]
[-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 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. 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 _n_a_m_e
This option selects the X display to use. Note this refers to the X
-
screen abstraction, not the monitor (or output).
-
--screen _s_n_u_m
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 _w_i_d_t_hx_h_e_i_g_h_t[+_x+_y[/_t_r_a_c_k___w_i_d_t_hx_t_r_a_c_k___h_e_i_g_h_t+_t_r_a_c_k___x+_t_r_a_c_k___y[/_b_o_r_d_e_r___l_e_f_t/_b_o_r_d_e_r___t_o_p/_b_o_r_d_e_r___r_i_g_h_t/_b_o_r_d_e_r___b_o_t_t_o_m]]]
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 _-_-_f_b 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 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 rotation 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 _n_o_n_e, in which case the default
values are used (a unit matrix without filter).
-
--scale _xx_y
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 _-_-_t_r_a_n_s_f_o_r_m 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 _w_i_d_t_hx_h_e_i_g_h_t
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 _w_i_d_t_hx_h_e_i_g_h_t
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 _d_p_i
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 _n_a_m_e _m_o_d_e
New modelines can be added to the server and then associated with outputs.
-
This option does the former. The _m_o_d_e is specified using the ModeLine
syntax for xorg.conf: hdisp hsyncstart hsyncend htotal vdisp vsyncstart
vsyncend vtotal _f_l_a_g_s. _f_l_a_g_s 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 ccvvtt.
-
--rmmode _n_a_m_e
This removes a mode from the server if it is otherwise unused.
-
-
--addmode _o_u_t_p_u_t _n_a_m_e
Add a mode to the set of valid modes for an output.
-
-
--delmode _o_u_t_p_u_t _n_a_m_e
Remove a mode from the set of valid modes for an output.
-
Per-output options
-
--output _o_u_t_p_u_t
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 _m_o_d_e
This selects a mode. Use either the name or the XID for _m_o_d_e
-
-
--preferred
This selects the same mode as --auto, but it doesn't automatically enable or
-
disable the output.
-
--pos _xx_y
Position the output within the screen using pixel coordinates. In case reflection
-
or rotation is applied, the translation is applied after the effects.
-
--rate _r_a_t_e
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 _r_e_f_l_e_c_t_i_o_n
Reflection can be one of 'normal' 'x', 'y' or 'xy'. This causes the output
-
contents to be reflected across the specified axes.
-
--rotate _r_o_t_a_t_i_o_n
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 _a_n_o_t_h_e_r_-_o_u_t_p_u_t
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 _p_r_o_p_e_r_t_y _v_a_l_u_e
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 _c_r_t_c
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 _r_e_d:_g_r_e_e_n:_b_l_u_e
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 corrections 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 _s_i_z_e_-_i_n_d_e_x or --size _w_i_d_t_hx_h_e_i_g_h_t
This sets the screen size, either matching by size or using the index into
-
the list of available sizes.
-
-r, --rate, --refresh _r_a_t_e
This sets the refresh rate closest to the specified value.
-
-
-o, --orientation _r_o_t_a_t_i_o_n
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
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
SEE ALSO
Xrandr(3), cvt(1)
AUTHORS
Keith Packard,
Open Source Technology Center, Intel Corporation.
and
Jim Gettys,
Cambridge Research Laboratory, HP Labs, HP.