Comment # 8 on bug 910907 from Michael Chang

(In reply to Alain Quincerot from comment #6)
> Created attachment 618758 [details]
> new yastlog.
> 
> This is a new Yastlog.
> Note  there is no error during the run of the yast boot loader.
> But it is not possible to boot openSUSE 13.2 using EFI.
> 
> Several cases have been tested among distinct  BIOS setup parameters values:
> 
> 1- Secure Boot set to Enable 
>    ==> no GRUB2 menu, boot starts automaticaly Windows 8.1
> 
> 2- Secure boot set to Disable, startup with UEFI set to Only
>    ==> no GRUB2 menu, boot starts automaticaly Windows 8.1

For debugging above two issues, we need "efibootmgr -v" output from openSUSE or
any other linux distribution. I guess that Windows is on default UEFI path thus
booted automatically.

Did you try to interrupt the boot process for UEFI boot selection and do you
see openSUSE listed in that menu?  

> 
> 3- Secure boot set to Disable, startup with UEFI set to Both
>    ==> GRUB2 menu starts, OpenSUSE can boot
>    but when selecting Windows Boot, GRUB2 cannot start Windows and it
> crashes.

It looks to me that "Both" is "legacy+UEFI" and is possible that it tried to
boot from legacy path. It depends on your disk's history and may work
incidentally. 

While grub booted, could you please type 'c' to enter command mode and paste to
output of 'set' command here to make sure that the grub image is uefi ?

Thanks.