FAb7D For my part, I managed to change the wallpaper of the login screen by installing the gnome-tweaks package. Launch the application, then select the Appearance menu.

      penny-farthing
      Thanks, but it doesn't work, I use Budgie, but I tried, I can change the desktop background and that's it.

        try with lightdm-settings it should work. it's not installed by default

        Found it, it was my stupid mistake, I was pointing to an image in my home, therefore not readable before logging in. Instead of lightdm-settings you can edit /etc/lightdm/lightdm.conf , it's the same.

        19 days later
        JoshStrobl unstickied the discussion .