Comment # 10 on bug 1008289 from Michael Chang

(In reply to Michael Chang from comment #5)

>  https://github.com/rhinstaller/efibootmgr/pull/23

I applied the patch to efivar package and still does not work. Apparently it
improves the boot variable by getting correct partition start and size, but
still not what firmware expect.

What it creates

Boot0000* opensuse     
HD(5,MBR,0x4294967194,0x1000,0x4d800)/File(\EFI\opensuse\grubx64.efi)

OTOH the OVMF firmware expect something like:

HD(1,MBR,0x4294967194,0x800,0xdeadbeef)/HD(1,MBR,0x4294967194,0x1000,0x4d800)/File(\EFI\opensuse\grubx64.efi)

Finally latest upstream git simply drops error message to extended partition. 

https://github.com/rhinstaller/efivar/blob/master/src/disk.c#L79