"no root file system is defined"

How did you install Ubuntu? Did you install it with Wubi inside Windows, or did you install it by booting from the Ubuntu install CD?

I installed it from the Ubuntu install CD.
I really was not ready to install Ubuntu, but most of the time when I tried to run it from the Ubuntu CD, it would hang up when asking form userid/password (rejecting whatever I gave it), and if I waited for it to timeout and continue without userid/pw,
it would not "timeout" and p[roceed, so I installed it on my hard drive from the CD. Now, I get the messages as stated in the
first post.

Thanks for your response and help.

"I installed it from the Ubuntu install CD."

After booting from the install CD, or from the install CD **while in Microsoft Windows**?

When you boot from the CD, you should not be asked for a password to log on, nor to perform most tasks (including administrative tasks). However, if you are asked for a username and password on the Ubuntu live CD, the username is "ubuntu" (without the quotes) and the password is blank (i.e., just press enter).

Is your installed Ubuntu system at all usable? Do the messages just appear while Ubuntu boots up, without having any apparent effect, or does this problem prevent you from using your installed Ubuntu system?

I installed from the CD while in MS Windows.
The userid/pw problem when booting from the CD has disappeared, and
there is now no problem using the LiveCD boot.

I cannot use the installed Ubuntu system at all. When I boot Ubuntu,
the "Verifying Installation Configuration" window comes up, with
never-ending error message stating that "no root file system is
defined" and "please correct this from the partitioning menu".

The only way I can get out of this error message looping is to power
down the computer.

On 5/15/11, Eliah Kagan <email address hidden> wrote:
> Your question #157490 on Wubi changed:
> https://answers.launchpad.net/wubi/+question/157490
>
> Status: Open => Needs information
>
> Eliah Kagan requested more information:
> "I installed it from the Ubuntu install CD."
>
> After booting from the install CD, or from the install CD **while in
> Microsoft Windows**?
>
> When you boot from the CD, you should not be asked for a password to log
> on, nor to perform most tasks (including administrative tasks). However,
> if you are asked for a username and password on the Ubuntu live CD, the
> username is "ubuntu" (without the quotes) and the password is blank
> (i.e., just press enter).
>
> Is your installed Ubuntu system at all usable? Do the messages just
> appear while Ubuntu boots up, without having any apparent effect, or
> does this problem prevent you from using your installed Ubuntu system?
>
> --
> To answer this request for more information, you can either reply to
> this email or enter your reply at the following page:
> https://answers.launchpad.net/wubi/+question/157490
>
> You received this question notification because you asked the question.
>
>

Please refer to this thread for an idea of what might be the cause and how
to diagnose: http://ubuntuforums.org/showthread.php?t=1743189

Post back the bootinfoscript results here (via http://pastebin.ubuntu.com/ )
if you need help reviewing the results.