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DISPLAY as :1 typically means that your X server instance is running on display :1, but why it doesn't runs in :0, there is no other display nothing else is connected with my laptop, why it chose :1 , my system is rhel 8.4

[work@localhost Desktop]$ xls 
xlsatoms xlsclients xlsfonts 
[work@localhost Desktop]$ xlsclients -display :0 
xlsclients: unable to open display ":0" 
[work@localhost Desktop]$ xlsclients -display :1 
localhost.localdomain gnome-shell 
localhost.localdomain ibus-x11 
localhost.localdomain ibus-extension-gtk3 
localhost.localdomain gsd-power localhost.localdomain gsd-xsettings 
localhost.localdomain gsd-wacom localhost.localdomain gsd-subman 
localhost.localdomain gsd-color localhost.localdomain gsd-clipboard 
localhost. localdomain gsd-keyboard 
localhost.localdomain gsd-media-keys 
localhost.localdomain org,gnome,software localhost.localdomain seapplet 
localhost.localdomain evolution-alarm-notify 
localhost.localdomain gnome-terminal-server
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  • Your display manager might be taking up :0?
    – muru
    Commented Jul 5 at 1:48
  • @muru it doesn't work like that. The display server spawns the user session for the same X.org $DISPLAY.
    – Artem S. Tashkinov
    Commented Jul 5 at 6:35
  • 1
    @UNREAL does it bother you? Stops you from doing something? Please post the output of ps ax | grep Xorg
    – Artem S. Tashkinov
    Commented Jul 5 at 6:35
  • 1
    @ArtemS.Tashkinov that is not always the case. IIRC LightDM at least had it configurable whether it reused the X server for the user session.
    – muru
    Commented Jul 5 at 6:48

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