[ubuntu] Can not boot any Grub options when trying to install using EFI.

Hi all,

Have recently taken an interest in EFI boot feature on newer systems.

Had recently posted a similar question here but following the advice in https://help.ubuntu.com/community/UEFI at Chapter 1 Section 6 explains to post questions in this forum which i am doing in the hope to better the chances of getting a solution. Will post Boot Info Summary soon.

The hardware being used is Tianocore based firmware using specification EFI 1.1.

Using an Ubuntu 12.10 amd64 Desktop dvd on an EFI capable machine have black and white Grub boot options screen running in EFI mode. Selecting "Try Ubuntu without installing" or "Install Ubuntu" gives "can not read cd/0" and "the kernel needs to be loaded first" errors.
Both .iso and burned disc md5 checksum are good.

Trying latest release of other distros gives similar results. Trying booting newer and older flavours of Ubuntu gives similar results when booting EFI mode and trying any of the options available to boot to simply do not work.
Dropping to grub command line and trying
or
only confirms missing EFI files.
**Update:** Can not repeat the results using those commands but do get similar output from using Code:

from grub prompt which gives


How to point grub to usable EFI files in order to boot "Try Ubuntu without installing?" or "Install Ubuntu?"