Disable (or make configurable and default to off) suspend-then-hibernate behavior in GNOME-3.30

[Hans de Goede]

Hi Benjamin, Carlos,

I'm mailing you 2 because you maintain g-s-d now.

As discussed on the Fedora desktop mailinglist in the

"system now hibernates automatically 3 hours after suspend ?"

thread, the suspend-then-hibernate behavior is not really
ready for mainstream use yet (according to the systemd folks).

Also from a kernel pov all of a sudden using hibernate is
a huge change and involves code paths which no other major
distro has been using sofar.

So we really need to disable this for Fedora 29. And as
mentioned in the thread when we decide to enable this for
a future release, it really needs to go through the changes
process so that it is well document we are changing this
and people will have a clue what is the likely culprit
if leaving their laptop suspend for > 3h all of a sudden
breaks.

Regards,

Hans