Apparently this issue also happens in gnome (I haven't used gnome since 2000 and never in 2 monitor environment). In a youtube video they recommend to use hydra-paper https://github.com/GabMus/HydraPaper/ to "create" the wallpaper merging the 2 images in one and use this as wallpaper.
So, maybe the best/simple solution is to include a good wallpaper manager in lubuntu next. Here is the video https://www.youtube.com/watch?v=3svfVEiOCBU&t=329s -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1730411 Title: Multiple monitors wallpaper handled as only one big monitor. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/openbox/+bug/1730411/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs