Comment 30 for bug 1003309

I used the following procedure to access the encrypted data:
1: Boot Ubuntu Desktop amd64 12.04 LiveCD.
2: Try Ubuntu
3: Start Terminal and run
sudo su -
apt-get update
apt-get install cryptsetup initramfs-tools lvm2
modprobe aes-x86_64
modprobe dm-crypt
modprobe dm-mod
cryptsetup luksOpen /dev/sda5 pvcrypt
vgscan
vgchange -a y barbera
mount /dev/mapper/barbera-root /mnt

Then I could cd into /mnt and access the data.
So, what to do from here? How do I fix the system?