Problems with edd

[Keith Roberts <keith@karsites.net>]

Hi all. I have a problem with trying to boot from a Fedora 9 
installation CD-R. It works on another machine, so the disk 
is OK. I guess if anyone knows the answer then it will be 
found here on the kernel developers list.

When trying to boot from a CD-R installation disk, on my 
Advent 6415 laptop I get the following:

Welcome to Fedora 9! [the installer splash screen]

  I then click on either:

  Install or upgrade an existing system
  [or]
  Install or upgrade an existing system (text mode)

  [both give me the same following error]

  Loading vmlinuz........................................... 
..............

  Loading initrd.img........................................ 
.................
  ...............ready.
  Probing EDD (edd=off to disable)... ok
  vmlinuz: attempted DOS system call
  boot:

  If I hit return now, the machine goes back to the 'Welcome 
to Fedora 9!' splash screen.

I have edited the kernel parameters at the spalsh screen and 
tried:

edd=skipmbr edd=off

All that does is not display the line:
  Probing EDD (edd=off to disable)... ok

The installation still hangs at the boot: prompt.

Has anyone come across the behaviour before please?

Is there any way I can get my laptop to boot from this 
media, maybe by passing some undocumented kernel parameters?

Kind Regards,

Keith Roberts