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When I boot Raspberry pi 4b without a desktop (no matter buster or bullseye), the image is duplicated on two displays. If I boot the operating system with a desktop, then the displays show an extended picture. How can I load the Raspbian desktop on two displays with duplication? So that the desktop on the displays is shown the same.

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    Several options. e.g. use the display config utility and drag & drop 1 display on top of the other
    – Dirk
    Jul 21, 2023 at 16:58
  • @Dirk if you have time to write a full answer or provide a link to a tutorial on how to do this I would appreciate it.
    – Alexandr
    Jul 22, 2023 at 5:52

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Write in console or in script:

xrandr --output HDMI-2 --same-as HDMI-1

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