Comment # 3 on bug 1179981 from Marco M.

I did further tests and I was not able to reproduce the issue when using shim.
The system seems able to deal with EFI on RAID1 if you opt for secureboot in
bootloader configuration, regardless of whether secureboot is enabled or
disabled in the bios.

I'm very sorry for this, I cannot explain what happend. I checked the patch
released in the last few days but they do not seems related to this kind of
bugs.

I'm attaching the output of efibootmgr -v after the installation, after the
system update and after an update-bootloader --reinit. They look fine.

Now I kindly ask: Is EFI on raid1 supposed to be supported even without using
shim (without selecting secureboot in bootloader configuration)?
In LEAP 42.3 this was supported. If in LEAP 15.2 it is officially NOT supported
then the bug can be closed (but I suggest to better specify this aspect in
documentation).