After hibernation, I can't choose the OS

Good Morning.
I hope this is the right section for this (maybe something link application > hibernate would be more appropriated).

I have a pc with openSuse 13.1 and other operating system installed.
The bootloader is openSuse's grub2.

When I hibernate openSuse, and then reboot, I see the grub's line "grub2...welcome to grub!" or something similar, but after that the screen from which I can choose the OS is not shown, and instead the resume of openSuse start.

Is there a way of fixing that?

thank you very much
Alessandro