I just booted up my Xubuntu 18 machine and noticed (almost) none of my windows had title bars. Look at this screenshot to see more of what I mean. What's interesting is Chrome still has it's title-bar, but just no close/minimize in the corner (maybe because it's custom made instead of the default title-bar?). Also, the windows aren't listed on the system bar (top left).
I didn't update or change any settings yesterday that I can think of. I did just update on startup by habit, but the issue was already there. Restarting twice did nothing. I also noticed
Alt-F4 doesn't close any windows (except Chrome oddly enough) and I've been at the mercy of whether or not the window has a menu option
File > Quit.
I don't have anything fancy installed for graphics (no custom title-bars or whatever), just xfce.
Let me know what other information I need to provide.
Well, I just trashed my system trying to fix it so I have to rebuild it from a backup anyways *sigh*.
For future users, I did create a dummy user in
/home and it had no problems. It must have been something in my home directory that was causing the issue.