Still happening in 16.04 thought starting gnome-screensaver does not make Crtl-Alt-L (or Crtl-Shift-L) work. Locking from the cli does work.
Still happening in 16.04 thought starting gnome-screensaver does not make Crtl-Alt-L (or Crtl-Shift-L) work. Locking from the cli does work.