You don't have to copy the XML generated by shotwell to gnome- background-properties. You have to create a different XML (I named it wallpaper.xml) with this code that points to the XML from shotwell:
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE wallpapers SYSTEM "gnome-wp-list.dtd"> <wallpapers> <wallpaper deleted="false"> <name>Shotwell</name> <filename>/home/<user>/.local/share/shotwell/wallpaper/wallpaper.xml</filename> <options>zoom</options> </wallpaper> </wallpapers> Now, if you go to the wallpapers settings you will se your slideshow there -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to shotwell in Ubuntu. https://bugs.launchpad.net/bugs/1965812 Title: After "apt upgrade" around Mar 18, shotwell desktop slideshow does not work any more To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/shotwell/+bug/1965812/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs