Comment 26 for bug 430272

Hi,
For those that can't boot to your system no matter what, here is my solution (chroot from live cd):

1. boot from the live cd
2. open console
3. mount your root partition:
    # sudo mkdir /media/SYS_ROOT
    # sudo mount /dev/sda1 /media/SYS_ROOT (change sda1 to whatever device contains your filesystem)
4. chroot to /media/SYS_ROOT:
    # sudo chroot /media/SYS_ROOT
5. update your system
    # sudo apt-get update
    # sudo apt-get upgrade
6. reboot.

The above steps worked for me, and my system is up and running (chroot will be missing /proc this will cause some warnings about apt log but in my case it upgrade correctly)

Regards,
Paulo