i just rotated the second monitor to portrait/vertical mode, but cant set the wallpaper vertical..."desktop settings" keeps wallpaper horizontally and half of monitor is black...if I add panel on this screen , after restart panel appeared in the middle of the screen ,in the bootom of this horizontal wallpaper,
but all programs i can fully maximize ...

ok..after the last update (Fedora/Arquetype) and the restart , second monitor wallpaper looks ok....somehow...

next rerstart same problem...