Comment # 12 on bug 1167780 from Fabian Vogt

(In reply to Steffen Winterfeldt from comment #10)
> But if you want a specialized solution just for microos and are sure no-one
> else will look at LOADER_TYPE: supporting grub2-auto on the pbl side
> just means adding scripts in /usr/lib/bootloader/grub2-auto that delegate
> to their grub2 resp grub2-efi counterpart.

Then I'd just use the jeos-firstboot snippet to set it based on the type of the
first boot. Otherwise I'd have to maintain a pbl script forever, just for
MicroOS. It's also possible that someone installs yast on microos, so I can't
even be sure that LOADER_TYPE isn't read by anything else.

(In reply to Neil Rickert from comment #11)
> Just a note on this.
> 
> I have Tumbleweed installed on an external USB drive, for booting with
> either MBR/BIOS booting or UEFI booting.  Installing that way works (the
> install succeeds) even if the installer is booted with UEFI.

This would be a use case for having both targets installed, but with one
important difference: "--removable". If efivarfs is available, "grub2-efi"
with SECURE_BOOT=yes would not install into /EFI/BOOT but /EFI/opensuse
and create a boot entry for it.