Sleepmode
From ArchWiki
Sleepmode
An easy way is use "suspend to swap" by adding
resume=/dev/disk/by-uuid/"your-swap-uuid"
to the kernel line inside /boot/grub/menu.lst. find your
/dev/disk/by-uuid/
for the swap Partition by
/bin/ls -lF /dev/disk/by-uuid/
and put it behind
kernel /vmlinuz26 root=/dev/disk/by-uuid/"uuid" resume=/dev/disk/by-uuid/"your-swap-uuid" vga=792 ro
You can use it perfectly with gnome-power-manager