Comment # 22 on bug 1018741 from lists dev

Looking more closely at the debug.log before the stall,

I see the shim.efi open
    ...
    [Bds]Booting opensuse-secureboot
    FSOpen: Open '\EFI\opensuse\shim.efi' Success
    [Bds] DevicePath expand:
HD(1,GPT,12A830DE-7E2F-4DC6-B64F-B886FB80E77C,0x800,0x3F7DF)/\EFI\opensuse\shim.efi
->
PciRoot(0x0)/Pci(0x1,0x1)/Ata(Primary,Master,0x0)/HD(1,GPT,12A830DE-7E2F-4DC6-B64F-B886FB80E77C,0x800,0x3F7DF)/\EFI\opensuse\shim.efi

As you indicate, it apparently makes a 'decision', and continues

    [Security] 3rd party image[0] can be loaded after EndOfDxe:
PciRoot(0x0)/Pci(0x1,0x1)/Ata(Primary,Master,0x0)/HD(1,GPT,12A830DE-7E2F-4DC6-B64F-B886FB80E77C,0x800,0x3F7DF)/\EFI\opensuse\shim.efi.
    InstallProtocolInterface: 5B1B31A1-9562-11D2-8E3F-00A0C969723B 7DB68040
    Loading driver at 0x0007CFBC000 EntryPoint=0x0007CFDA000 
    InstallProtocolInterface: BC62157E-3E33-4FEC-9920-2D3B36D750DF 7DB87118
    FSOpen: Open '\EFI\opensuse\grub.efi' Success
    PixelBlueGreenRedReserved8BitPerColor
    ...

Note that it appears to next Open

    \EFI\opensuse\grub.efi

Isn't that supposed to be 

    \EFI\opensuse\grubx64.efi

?

At this point I'm not at all sure what to expect, and am just hunting for clues
as to why it stalls.