First, let me start off by saying I truly dislike Gnome, and the attitude by the Gnome devs that somehow giving people options is a bad thing. Why is it that I cannot easily change the background image of the Gnome login screen? Why do I have to use hacks like this one? Why do the hacks always have to change? Anyway, for Gnome 2.32.1 which shipped with OpenSUSE 11.4 the way to change the login background image is like this:
As root:
mv your_new_image.jpg /usr/share/pixmaps/backgrounds/gnome/background-default.jpg
Where your_new_image.jpg is the image you want to be the new background image.
