Comment 2 for bug 1617345

I was able to do a quick glance on the affected host. So the problem is not the
new version of grub-ieee1275 and more that there is a new version. IOW something
is causing something like dpkg-reconfigure grub-ieee1275 to run. I have not
figured out what exactly is done but both

- grub-install
- grub-install /dev/mapper/mpath0-part1

would work. However dpkg-reconfigure runs in a way that tries to directly access
one of the multipath path devices and returns an error.
So the question is somehow whether its possible to prevent dpkg-reconfigure from
what it is doing under the hoods...