Changing the default login wallpaper in PopOS!

To complete the theme of my new rig I wanted to change the background shown on the login screen. This can be done in two steps:

Edit /usr/share/gnome-shell/theme/pop.css and change the lockDialogGroup background to point to the file you want to use as the wallpaper. I kept the file along side the existing assets and made sure owner/group/other had read access to the file.

#lockDialogGroup {
background: #2e2927 url("assets/file.ext");
background-repeat: repeat;
}

If you wanted to place the wallpaper in with existing assets you would copy the wallpaper to /usr/share/gnome-shell/theme/assets/<file.ext>.

Set the read permissions using chmod ugo+r <file.ext>.

I hope this helps you to make your PopOS! install a little more like home.

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