Recently, VLC Media Player on my Fedora 27 installation running the Cinnamon desktop has been missing the title bar and window decorations, resulting in VLC not being a proper window and only a full-screen application. For me, this behavior is undesirable.
To restore normal functionality it’s easiest to simply delete the VLC configuration:
rm -r ~/.config/vlc
Now, VLC will function normally. Preferences will have to be recreated, but if you’re like me, you don’t need much more than the ability to play media.