Cannot Hibernate with GRUB2 and CryptSwap

Binary package hint: grub2

I'm a newbie with Grub2, but I think the problem is here

I have a crypted personal directory. Then, the swap partition in /dev/mapper/cryptswap1 is crypted too.

When I try to hibernate my laptop, it seems doing well, but when it boots again, it doesn't resume (it start a fresh session).

Googling, I have found I need a resume file with my UUID partition in /etc/initramfs-tools/conf.d, but when I try to create it, I got

myuser@myhost:/etc/initramfs-tools/conf.d$ sudo update-initramfs -u
update-initramfs: Generating /boot/initrd.img-2.6.31-14-generic
cryptsetup: WARNING: target cryptswap1 has a random key, skipped

Any suggestion or workaround will be welcomed (Is it easy to eliminate crypted directory and partititon?).

ProblemType: Bug
Architecture: i386
Date: Tue Nov 17 19:32:30 2009
DistroRelease: Ubuntu 9.10
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release Candidate i386 (20091020.3)
Package: grub2 (not installed)
ProcEnviron:
 LANG=es_ES.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-14.48-generic
SourcePackage: grub2
Uname: Linux 2.6.31-14-generic i686
XsessionErrors:
 (gnome-settings-daemon:3212): GLib-CRITICAL **: g_propagate_error: assertion `src != NULL' failed
 (nautilus:3310): Eel-CRITICAL **: eel_preferences_get_boolean: assertion `preferences_is_initialized ()' failed
 (polkit-gnome-authentication-agent-1:3333): GLib-CRITICAL **: g_once_init_leave: assertion `initialization_value != 0' failed
 (gnotime:3315): GLib-CRITICAL **: g_tree_destroy: assertion `tree != NULL' failed