* https://gitlab.gnome.org/GNOME/mutter/-/issues/1871
  * https://gitlab.gnome.org/GNOME/mutter/-/tree/main/src/tests/monitor-configs?ref_type=heads
  * https://gitlab.gnome.org/GNOME/mutter/-/blob/main/src/tests/monitor-configs/max-bpc.xml?ref_type=heads (maxbpc)
  * https://gitlab.gnome.org/GNOME/mutter/-/blob/main/src/tests/monitor-configs/rgb-range.xml?ref_type=heads (rgbrange)
  * https://gitlab.gnome.org/GNOME/gdm/-/issues/553#note_2456876

  nano ~/'.config/monitors.xml'

<code>
        </mode>
        <rgbrange>full</rgbrange>
        <maxbpc>12</maxbpc>
      </monitor>
</code>

<code>
<monitors version="2">
  <configuration>
    <layoutmode>physical</layoutmode>
    <logicalmonitor>
      <x>0</x>
      <y>0</y>
      <scale>1</scale>
      <primary>yes</primary>
      <monitor>
        <monitorspec>
          <connector>HDMI-1</connector>
          <vendor>GSM</vendor>
          <product>LG TV</product>
          <serial>0x01010101</serial>
        </monitorspec>
        <mode>
          <width>1920</width>
          <height>1080</height>
          <rate>60.000</rate>
        </mode>
        <rgbrange>full</rgbrange>
        <maxbpc>12</maxbpc>
      </monitor>
    </logicalmonitor>
    <disabled>
      <monitorspec>
        <connector>eDP-1</connector>
        <vendor>BOE</vendor>
        <product>0x06cb</product>
        <serial>0x00000000</serial>
      </monitorspec>
    </disabled>
  </configuration>
</monitors>
</code>

  sudo cp -fv ~/'.config/monitors.xml' '/etc/xdg/monitors.xml'

  sudo rm -fv ~/'.config/monitors.xml' '/etc/xdg/monitors.xml'