On a fresh image of Leap JeOS for Raspberry Pi, the `grub2-once` tool fails
with following output:

```
localhost:~ # grub2-once --list
no grub2_dir at /usr/sbin/grub2-once line 225.
```

The same bug occurs after applying patches.

This makes rebooting to a non-default option difficult, because for that the
number of the menu entry is important.

## Set-up:

-   Raspberry Pi 3 B+ with 32GB SD card
-   [oS Leap 15.0 JeOS image for Raspberry Pi 3][1] flashed on the SD card, as
suggested by our [Raspberry Pi 3 wiki page][2]
-   For SSH access, ethernet cable connected to laptop (DHCP server started on
laptop with `nm-connection-editor` and GNOME's network settings)

## Steps to reproduce:

-   ssh in
-   type `grub2-once --list`

## Possibly related behaviour:

After installing the YaST bootloader module, no entries (empty field) are
displayed in YaST -> System -> Boot Loader -> Bootloader Options -> Default
Boot Section.

After running `zypper patch`, which included a new kernel, the bootmenu entries
including entries for the new kernel showed up in YaST, but `grub2-once --list`
still failed.

Unfortunately, I do not have a spare display and keyboard available to see the
boot menu "in action".

## How I found this

I am trying to install a Leap Transactional Server on the Pi and wasn't sure
how to write a KIWI file for a prebuilt image. Hence, I installed the minimal
OS and consulted the [wiki page on remote installation][3].

---

[1]:
http://download.opensuse.org/ports/aarch64/distribution/leap/15.0/appliances/openSUSE-Leap15.0-ARM-JeOS-raspberrypi3.aarch64-2018.07.02-Buildlp150.1.1.raw.xz
[2]: https://en.opensuse.org/HCL:Raspberry_Pi3
[3]: https://en.opensuse.org/SDB:Remote_installation