I saw those. I was wondering how you know they're there if they're not visible in the screenshot. But now I remember mutter/gnome-shell will clip each screen so generally nothing will appear in those black offscreen areas even in screenshots.
This issue might be caused by the absence of any screen in the usual top-left corner (0,0). Regardless, if this is Ubuntu 18.04 then the desktop icons are provided by nautilus-desktop, which is not being developed any more, and not available in later Ubuntu versions :/ ** Changed in: nautilus (Ubuntu) Status: Incomplete => New ** Tags added: multi-monitor ** Tags removed: multi-monitor ** Tags added: multimonitor -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to nautilus in Ubuntu. https://bugs.launchpad.net/bugs/1862500 Title: Desktop icons are placed off-screen when using multiple monitors To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nautilus/+bug/1862500/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs