NAME

       gdctl - GNOME Display Controller

SYNOPSIS

       gdctl [-h] COMMAND ...

DESCRIPTION

       gdctl  provides  means  to show the active monitor configuration, and set new monitor configuration using
       command line arguments.

       It requires a compositor that supports the org.gnome.Mutter.DisplayConfig D-Bus API, such as GNOME Shell.

COMMANDS

       show
          Show the current display configuration

       set
          Set a new display configuration

       pref
          Set display related preferences.

SHOW OPTIONS

       --help, -h
          Show a help message and exit.

       --modes, -m
          List available monitor modes.

       --properties, -p
          List properties.

       --verbose, -v
          Display all available information (equivalent to --modes --properties).

SET OPTIONS

       --help, -h
          Show a help message and exit.

       --persistent, -P
          Store applied configuration on persistent storage and restore when applicable.

       --verbose, -v
          Print configuration to standard out before applying it.

       --verify, -V
          Only verify, without applying, the configuration.

       --layout-mode LAYOUT-MODE, -l
          Specify the layout mode the configuration should use. Either logical, or physical.

       --logical-monitor, -L
          Add and configure a logical monitor. See LOGICAL MONITOR OPTIONS.

       --for-lease-monitor CONNECTOR, -e CONNECTOR
          Set a monitor, that is not part of any logical monitor, available for lease.

LOGICAL MONITOR OPTIONS

       --monitor CONNECTOR, -M CONNECTOR
          Add a monitor to the currently configured logical  monitor.  All  monitors  within  the  same  logical
          monitor must have the same monitor resolution.

       --primary, -p
          Mark currently configured logical monitor as primary.

       --scale SCALE, -s SCALE
          Scale  monitors  within the currently configured logical monitor with SCALE. Must be a scale supported
          by all monitors and their configured modes.

       --transform TRANSFORM, -t TRANSFORM
          Transform  monitors  within  the  currently  configured  logical  monitor  using  TRANSFORM.  Possible
          transforms are normal, 90, 180, 270, flipped, flipped-90, flipped-270 and flipped-180.

       --x X, -x X
          Set the X position of the currently configured logical monitor.

       --y Y, -y Y             Y position
          Set the Y position of the currently configured logical monitor.

       --right-of CONNECTOR
          Place the logical monitor to the right of the logical monitor CONNECTOR belongs to.

       --left-of CONNECTOR   Place left of other monitor
          Place the logical monitor to the left of the logical monitor CONNECTOR belongs to.

       --above CONNECTOR
          Place the logical monitor above the logical monitor CONNECTOR belongs to.

       --below CONNECTOR
          Place the logical monitor below the logical monitor CONNECTOR belongs to.

MONITOR OPTIONS

       --mode MODE, -m MODE
          Set the mode of the monitor.

       --color-mode COLOR-MODE, -c COLOR-MODE
          Set the color mode of the monitor. Available color modes are default and bt2100.

PREFS OPTIONS

       --monitor CONNECTOR, -M CONNECTOR
          Change monitor preferences. See MONITOR PREFS OPTIONS.

MONITOR PREFS OPTIONS

       --luminance LUMINANCE, -l LUMINANCE
          Set the luminance of the monitor for the current color mode.

       --reset-luminance
          Reset the luminance of the monitor for the current color mode to its default.

EXAMPLES

       Mirror  DP-1  and  eDP-1,  and  place  DP-2, transformed by 270 degrees, to the right of the two mirrored
       monitors.

          gdctl set --logical-monitor
                    --primary
                    --monitor DP-1
                    --monitor eDP-1
                    --logical-monitor
                    --monitor DP-2
                    --right-of DP-1
                    --transform 270

       Set eDP-1 and DP-2 as available for lease.

          gdctl set --logical-monitor
                    --primary
                    --monitor DP-1
                    --for-lease-monitor eDP-1
                    --for-lease-monitor DP-2

BUGS

       The bug tracker can be reached by visiting the website
        <https://gitlab.gnome.org/GNOME/mutter/-/issues> .  Before sending a bug report, please verify that  you
       have  the  latest  version  of gnome-shell. Many bugs (major and minor) are fixed at each release, and if
       yours is out of date, the problem may already have been solved.

ADDITIONAL INFORMATION

       For further information, visit the website
        <https://gitlab.gnome.org/GNOME/mutter/-/blob/main/README.md> .

                                                                                                        GDCTL(1)