When you turn it on you may see message:
Invalidating stale software suspend imagesand then the systems boot from scratch like it has beeing rebooted... What the fuck? Well in my case the
line was missing in /boot/grub/grub.cfg.
Well, you can add it there by hard. (Why it is not there by default? Well I am not a Debian guy, so I do not even know where to fill the bug actually, but I am providing a hack. Stone me.) Just add something like this line:
to file /etc/default/grub.
That't it. It worked for me.