Comment # 9 on bug 1008289 from Michael Chang

(In reply to Michael Chang from comment #8)
> I mean / and /boot/efi on primary partition should work, but since I did not
> test it, I will do to confirm ..

I encountered yast2 partition warnings and errors during the installation. But
after all the system boots and also chainloading xen hypvervisor works.  

I'll attach screen shots of errors later.

> And meanwhile, I think I find the reason why "error: not a valid root
> device." happens when chainloading and am working on. I will update it and
> also the test result of / and /boot/efi on primary partition next Monday as
> I will be AFK sooner or later.

It is indeed related to device path. Grub2 treats the Hard Drive Media Device
path as single node for a given partition. But for logical partition, it's an
exception with two nodes for each one node for extended partition in mbr and
the other for enclosed logical partition. That's what I got from OVMF, but did
not verify on any shipped UEFI hardware.

Anyway the testing package is provided in the project
https://build.opensuse.org/package/show/home:michael-chang:bsc:1008289/grub2