I've got 2 monitors so I want to use nitrogen to set a different wallpaper for each one.
I just made a clean Ubuntu install and installed gnome-shell and ubuntu-gnome-desktop. After that I installed nitrogen, and tried to change the wallpaper but it does nothing.
If If I toogle the "Icons on Desktop" option on the Tweak Tool it shows the wallpapers I selected on nitrogen for less than a second, and then back to the default wallpaper.
There used to be an option to disable the handling of the desktop by the file manager so nitrogen could do it, but I can't find it. How can this be achieved?