[Bug 754130] Re: amd64 debian-installer, natty from 04/05 fails

[teongleong]

This was not a problem till I recently updated my ubuntu linux kernel.
when i boot into ubuntu it took a long time saying something about
checking the disk or something.

After that trying to boot ubuntu always ends up with a black screen and
going into recovery mode tells me that my /home is not ready or cannot
be found. going into gpart tells me that it has indeed become an
unallocated partition.

my attempts at booting using ubuntu cd is met with the same problems as
described in this thread. I first see Error: Prefix not set then a menu
of 3 comes up and they all end up with a black screen with only an
underscore on the screen and it doesn't help to wait

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https://bugs.launchpad.net/bugs/754130

Title:
  amd64 debian-installer, natty from 04/05 fails

Status in “debian-installer” package in Ubuntu:
  Confirmed

Bug description:
  Binary package hint: debian-installer

  Using the Minimal CD, current, for Natty, amd64 from

  http://archive.ubuntu.com/ubuntu/dists/natty/main/installer-amd64/current/images/netboot/ 
  an error message is displayed:

  error "prefix" not set

  before grub displays its command line. Setting the prefix manually to
  (cd0,1)/boot/grub/x86_64-efi and setting the root to root=(cd0,1) at
  least allows to lad modules.

  Typing "normal" brings up the usual selection in text mode, no splash.
  However, none of the options works, everything ends with a black
  screen. This might be two different issues, though, since this is on a
  brand new Lenovo T420.

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