Comment 17 for bug 1201257

My laptop is ASUS S550C with Windows 8 pre-installed.
- Prepared partitions using Windows' own disk management utility. deleting D and shrinking C.
- I prepared a Ubuntu 13.04 (64 bit) ISO to boot with a USB.
- I Disabled Fast Boot. and disabled FastStartup.
- I used multiple media USB and DVD trying 13.4 and 12.10
every time when I reach the try Ubuntu install menu every choice leads to black screen.
just like the other bug reporter
"when I try to boot Ubuntu installation via USB/DVD in SecureBoot, computer doesn't give any error output, it is able to show me the UEFI boot menu (Install Ubuntu, Try Ubuntu, Check Disk for Errors, etc.) but when I select any of them, it just waits in black screen without any error message."
I only figured out it was a secure boot issue when I followed some advice to try Grub commands.
At that point I got a secure boot doesn't allow loading module error.
so I disabled SecureBoot.
Ubuntu installs fine. Restarts fine.
Grub window item leads to error message about device map not found and efi path incorrect
if I turn on SecureBoot. Windows loads immediately and Ubuntu is ignored.
So I checked and confirmed efi grub was installed.
I followed your advice and did
> sudo apt-get install grub-efi-amd64-signed shim-signed
> sudo grub-install --uefi-secure-boot
Now if I disable SecureBoot Ubuntu works and I still get the windows error form grub
If I enable SecureBoot I actually get a grub selection menu. Which is progress I suppose.
But now if I choose any Ubuntu item I get a purple screen vs. a black one I was getting from the installation media.
And Windows 8 still won't run from Grub same device map efi path error? help.