I have recently been trying to separate all three wallpaper states that are all the same as default. They are:
- Unity Greeter
- Lock screen
All of them have a wallpaper, and as default the three are all the same and changed by changing the desktop wallpaper. It is fairly simple to change the log in background in LightDM, but I haven't found any successful attempts to change the lock screen background and 'free' it from the consistent background setting.
I was looking around for a solution, and I got this:
sudo gconftool-2 --direct --config-source xml:readwrite:/etc/gconf/gconf.xml.defaults --set /desktop/gnome/background/picture_filename --type string /path/to/image.jpg
But it just doesn't work. No errors, no notes - it simply does affect the settings at all. The file it edits exists, and it looks reasonably legitimate for the purpose - but it's ineffective.
How would you correct the command or diagnose the problem with it?
I am using Ubuntu 12.10 Quantal Quetzal and am running Unity (if that isn't already obvious).