Comment 10 for bug 477169

Gergely, I am well aware that grub has a built in shell you can always use, but what is relevant is what shell you end up into once you have your error.

If after the error you end up in a grub shell it means it is a grub issue. If you end up in a busybox shell it means it is a filesystem/initrd issue. Because the error you mentioned is about a kernel panic, I would expect a filesystem/initrd issue.

If so, you should be able to reproduce the error within the LINUX busybox shell, by issuing the same commands that made the initrd fail (basically try to mount the ntfs partition). Those commands happen to be similar to the ones you mentioned for the grub shell, but they are actually performed by the Linux kernel within a Linux environments, as opposed to being performed by grub.