I've see the slide show (Pictures folder) screensaver. I've also seen how to change the background behind my login screen. What I haven't been able to figure out is how to display a slide show as a screensaver over my login screen. Can someone please point me in the right direction?
I don't think this is possible looking at how GNOME3 and GDM currently work. At least not without having to restart /etc/init.d/gdm3 every time you want the image to rotate. This seems impractical.
The steps to change the login and the lock screen wallpaper are discussed here in this post titled: Change desktop, login and lock screen wallpapers in GNOME 3.4.
I'll highlight the steps to change GDM's wallpaper just so you get a general idea of what I'm talking about.
step 1 - become the gdm user
step 2 - change the image
gsettings set org.gnome.desktop.background picture-uri file:///home/fabhax/wallpapers/NATURE-SkyStone_1920x1200.jpg
step 3 - restart gdm3
The steps are similar to do the same thing for the screen lock wallpaper. This could be scripted but it seems hackish.
Leave a comment if this is something you'd seriously like to have.