The issue there is likely that the calendar minimal width is larger than the horizontal screen resolution, and in this case gnome-shell can't make it fit on screen and such refuse the action. Unsure if there is an easy solution there
** Changed in: gnome-calendar (Ubuntu) Importance: Undecided => Low -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1806279 Title: No full screen possible in portrait mode To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-calendar/+bug/1806279/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs