Background Image on Lock Screen/Cosmic Login Greeter Does Not Consistently Match Selected Desktop

[ganakee]

2025-01-28 Pop OS Cosmic Epoch Wayland
On sudo apt-manage add popdev:master

Issue

The cosmic lock screen/login screen does not follow the user's selected desktop wallpaper settings IFF the user uses [solid] colors as the desktop wallpaper.

Desired Outcome

The cosmic lock screen/login screen follows the user's selected desktop wallpaper settings, whether a wallpaper image or a solid color. OR, a new way to select the lock screen image a la POP OS 22.04.

What Happens

1. Using the Comic Settings app (no other conflicting apps), select Desktop...Wallpaper...Colors (NOT wallpaper) and select a solid color.
2. Close Settings.
3. Logout.
4. The login screen displays the default Cosmic wallpaper background image (a galactic-type space scene) not the user-selected solid color.
5. Login.
6. Using the Comic Settings app (no other conflicting apps), select Desktop...Wallpaper...Wallpapers. Select a different wallpaper.
7. Close Settings.
8. Wallpaper image displays. Logout.
9. The login screen displays the newly selected wallpaper background image.
10. Login.
11. Using the Comic Settings app (no other conflicting apps), select Desktop...Wallpaper...Colors (NOT wallpaper) and select a solid color.
12. Close Settings.
13. Logout.
14. The login screen displays the default Cosmic wallpaper background image (a galactic-type space scene) not the user-selected solid color.

The multipleiterations here demonstrate that the lock screen is not using either the last-selected wallpaper image or the solid color.