I`m Unable To Set The Login Screen Wallpaper Of My Custom Wallpaper Is There Any Working Tool Which Changes Easily Without Any Bugs
Try Ubuntu Tweaks. To install, just press Ctrl+Alt+T on your keyboard to open Terminal. When it opens, run the command(s) below:
Another way of doing it, is right click on the desktop, and click Change Desktop Background. Click the + sign Browse, and choose the image, and click open The desktop background has changed with the new image This is the login screen, with the new image applied.