On Ubuntu Mate 21.10 is there any easy way to change the login screen background?
Adminstration>Login Window (enter password) click on backgrounds box, navigate to the background you want and set it. Personally I put the .jpeg or .png I want in usr/share/backgrounds.
As you can see from the pic below, there is no Login Window app in the Administration section of 21.10 MATE.
Found a way in a previous post:
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Still the best way with 24.04
@joesplace, If you are looking to add the missing package for that Control Panel app, the package name is "lightdm-settings":
If you are looking to customize the Lightdm utility, there is a second package to be installed, "lightdm-gtk-greeter-settings":
lightdm-gtk-greeter-settings doesn't work to change wallpaper of login screen.
I am not sure but Ubuntu Mate now uses the arctica-greeter. I think you would need to change back to the lightdm-autologin-greeter.
Don't change unless someone else gives you more information, as I said I am not sure.
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To get the "Login Window" settings back: change to slick-greeter
(I have done that on all my mate-installs since 22.04)
sudo apt purge arctica-greeter
sudo apt install slick-greeter
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Thanks, but I didn't install things, I just used the tips provided by joesplace