I have the KOTD repo added to a pretty simple plain Leap 42.1 x64 machine.

I did add this KOTD for a few months now. It always upgraded the kernels in the
past within the KOTD branch. Recently it went from 4.7 rc1 to rc2, then another
rc2 release and today zypper ref and zypper lu displayed that there would be a
non rc2 (rtm i suppose) for 4.7 kernel.

Zypper up installed this kernel but didnt activate this rtm one in the grub2
bootloader and thus didnt switch over after I just rebooted this machine.

----------

kernel-default-4.7.0-1.1.g24f30d5.x86_64
kernel-default-4.7.rc7-2.1.g152f160.x86_64
kernel-firmware-20160503-3.1.noarch

------

1 | KOTD                      | KOTD                                    | Yes  
  | (r ) Yes  | No      |  100     | rpm-md |
http://download.opensuse.org/repositories/Kernel:/HEAD/standard 


---------------

Linux linux 4.7.0-rc7-2.g152f160-default #1 SMP PREEMPT Thu Jul 21 12:38:47 UTC
2016 (152f160) x86_64 x86_64 x86_64 GNU/Linux


----------

There was a zypper and libzypp update just some days ago. I briefly read about
some new zypper problems and discussion on the bugs list or somewhere.
Maybe this is a bug within current zypper?

-----
zypper-aptitude-1.12.44-12.1.noarch
snapper-zypp-plugin-0.2.9.1-3.1.noarch
libzypp-15.22.2-12.1.x86_64
zypper-1.12.44-12.1.x86_64
PackageKit-backend-zypp-1.0.7-3.5.x86_64
zypper-log-1.12.44-12.1.noarch
zypp-plugin-python-0.5-4.2.x86_64
-----


How exactly does zypper replace the currently selected and in use kernel for
grub2 config?

How can I manually select which kernel package to use for grub2 when there are
multiple installed as in this case? what config setting and where and how
influences what stuff becomes added or replaced in the grub2 config?

Thanks.