I'm running GalliumOS on a Chromebook with gnome-screensaver as my screen locker. I am hoping to customize the lock-screen background but am having difficulty figuring out how to change it. It currently displays a different background from both the splash screen and the desktop background. Oddly enough it is also different from the default background for a new user. The desktop environment is xfce4 so the full gnome-shell doesn't seem available and normal configuration editing seems to not be working.
I started digging around for configuration files for gnome-screensaver but can't figure out where they are saved. The best I could find in the $XDG_CONFIG_DIRS/xfce4/xfconf directory was the xfce4-desktop.xml file. Which set the image-path property of the xfce-desktop channel to a symbolic link which pointed to a file of the same image as the lock-screen background.
Unfortunately changing where the symlink pointed does not seem to change the background image rendered by gnome-screensaver.
I tried digging into the source code for gnome-screensaver to see how that is set up but I'm not making much headway on it. Any suggestions?
