Comment 12 for bug 1716172

[Please somebody set this bug's status to something other than "needinfo".. It is not the reporter's turn.. It needs attention from somebody else that reporters.]

I found that if in Settings/"Session and Startup" I enable to launch light-locker and disable to launch gnome-screensaver, and before the (first) suspend I issue a locking (Super+L, light-locker) and resume [after which, by side-effect, the unused Laptop display's backlight turns on, erroneously - perhaps I will report it in a separate issue], then the suspend *works*! I.e. after resume from suspend my display settings (which display is enabled and which is not) are not corrupted.
(But, at least some time, the mouse pointer got lost.. :( Nightmare feeling..)

(I have - among others - "lightdm-gtk-greeter 2.0.1-2ubuntu4 amd64" and "light-locker 1.7.0-2ubuntu1 amd64".) (Does it matter?)

So, in short, in the Ubuntu 16.04 (and/or the Xfce4 with it), (among possibly others) the suspending does not work. At least when there are multiple monitors, and/or the user uses other UI-locker than light-locker, and/or the user odes not issue a UI-locking to precede the suspend.