Ubuntu
grub2 package

  1. Bug #1091464
  2. Comment #2

Comment 2 for bug 1091464

Revision history for this message
falstaff (falstaff) wrote : Re: Unable to chainload Windows 8 with Secure Boot enabled

On my Samsung Series 9 device I do have the exactly same behavior.

I documented this in my blog post:
http://falstaff.agner.ch/2012/12/18/ubuntu-12-10-and-windows-8-with-secure-boot-mode/

However, I observed that my original Windows Boot Manager has a slightly different file path:

Boot0008* Windows Boot Manager HD(2,96800,32000,f1fdeac1-d057-4f3b-9f66-6f74eb3b469b)File(\EFI\Microsoft\Boot\bootmgfw.efi)

compared to Grub:
/ACPI(a0341d0,0)/UnknownMessaging(12)/HD(2,fa800,96000,372001a2fb07f544,a3,ff)/File(\EFI\Microsoft\Boot)/File(bootmgfw.efi).

However, the same menu entry works if I disable Secure Boot. It looks like this slightly different file path only leads to an error when UEFI tries to check the signature....