How to change lockscreen and login wallpaper with Arctica greeter?

[Norbert_X]

Not sure how it goes in 21.10, but you can install LightDM back by following (which was written for previous release) link below:

Replace arctica-greeter back to slick-greeter on 20.10 for better compatibilty with other desktop environments

Some Ubuntu MATE users report incompatibilities between Ubuntu MATE 20.10 login screen and other window managers as i3. This question was asked today on AskUbuntu. Technically it is a bug of arctica-greeter. It ignores selection of i3 and loads MATE instead. I have reported the bug 1910279 to LaunchPad and upstream. This bug is not only i3-related, other desktops like Xfce are affected too. The workaround is to revert our latest change: replace Arctica Greeter back to Slick Greeter. sudo ap…