Same here - the swap partition to match the memory size did the trick. I'm on a Lenovo 480. To hibernate, I just type in "sudo systemctl hibernate" and it works

Same here - the swap partition to match the memory size did the trick. I'm on a Lenovo 480. To hibernate, I just type in "sudo systemctl hibernate" and it works, I'm happy. Incidentally, I've just upgraded my RAM to 64GB and it's in the process of resizing the swap partition right now!