grub1 + hibernate
# emerge hibernate-script # rc-update add hibernate-cleanup boot # nano /boot/grub/grub.conf
title Gentoo Linux genkernel
root (hd0,2)
kernel /boot/kernel-genkernel root=/dev/sda3 real_root=/dev/sda3 resume=swap:/dev/sda5 real_resume=/dev/sda5 resume2=swap:/dev/sda5 real_resume2=/dev/sda5
initrd /boot/initramfs-genkernel