Re: xfce only shows a black screen

[derlyne]

1. For a normal shutdown, use systemctl poweroff; for a reboot, systemctl 
reboot. 
2. Don’t use startx from inside an existing graphical login. 
3. If the desktop is black, try Ctrl+Alt+F2 , log in there, and check the 
session logs. 
4.  
journalctl -b -u lightdm --no-pager
tail -100 ~/.xsession-errors 
5. Also check whether the session is actually Wayland or X11 from a terminal 
inside the logged-in session
 echo "$XDG_SESSION_TYPE"