Ubuntu – change the lock screen background to be different from the desktop background

11.10lock-screenwallpaper

I want the lock screen background to be different from the desktop background in Ubuntu 11.10, how can I do that?

It's okay when I am using 11.04, why 11.10 can't? thanks

You could have at the answers here:

And see if any of these are what you want!

If it's a PPA install

sudo add-apt-repository ppa:communitheme/ppa
sudo apt update
sudo apt install ubuntu-communitheme-session

then this is the file

/usr/share/gnome-shell/theme/communitheme/gnome-shell.css

When it's a snap install

sudo snap install communitheme

this is the file

/snap/communitheme/1593/share/gnome-shell/theme/Communitheme/gnome-shell.css

but this snap file is Read-Only.. read about why this snap file cant be saved like other files. https://askubuntu.com/a/1035241/739431..

short .gif file for APT installed Communitheme unlock-screen change...
https://imgur.com/hR3FirP