uswsusp 0.8-1.1ubuntu3 (i386 binary) in ubuntu lucid

 This package (also known as µswsusp or simply suspend) contains the
 programs to use the userspace software suspend facility available in
 Linux kernels 2.6.17-rc1 and higher. It allows the system to have its
 state saved to disk and be powered off. On restarting, it will be put
 back in the state it was left in (this is sometimes called
 hibernation).
 .
 It also includes a program to suspend the system to RAM after the
 state is saved to disk. In that state, the system still uses power,
 but resuming is faster. If the battery depletes, the state is
 resumed from disk without data loss.
 .
 Optional features include encrypting the system snapshot and a themeable
 splash screen during the suspend and resume processes.
 .
 To use this package you need a Linux kernel version 2.6.17-rc1 or newer
 configured to use an initramfs. Hooks and scripts to integrate with
 initramfs-tools are provided.