Ubuntu 9.10 black screen problem after loading (solved)

Today problem: my customer computer (ubuntu 9.10) stuck with black screen after loading.

To see the problem details:

• Enter the grub menu (press F2)
• Press "E" to edit boot command
• Delete text "quite splash" to see booting details
• Press control+X to boot

If you see like this:
"Gave up wiating for root device. Common problems:
  - Boot args
    - check rootdelay= ...
    - check root= ...
 - missing modules (cat /proc/modules; ls /dev)
ALERT! /dev/disk/by-uuid/15448888-84a0-4ccf-a02a-0feb3f150a84 does not exist. Dropping to a shell!
BusyBox Built In Shell ...
(initramfs)

You have same problem with me, so this is the solutions:

• Find your root drive partition, example "/dev/sda1"
• Enter grub menu (press F2)
• Press "E" to edit grub command
• Change text "linux /boot/vmlinuz-2.6.31-16-generic root=UUID=xxxxxxxxxxxxxxxx ro quiet splash" with "linux /boot/vmlinuz-2.6.31-16-generic root=/dev/sdaXX ro quiet splash".
• Press ctrl+E to boot
• Finish, you can access your ubuntu again ;)

Source:
http://computergyan.wordpress.com/2009/12/31/solving-the-busybox-black-screen-problem-in-grub2ubuntu9-10/
Thx to this blog.