Comment # 93 on bug 1224773 from Stefan Dirsch

That's from %post of KMP installation.

# recreate initrd if old modules are still in there (gh issue#25) [1]
if lsinitrd | grep -q nvidia.ko;  then
  # Let all initrds get generated by regenerate-initrd-posttrans
  mkdir -p /run/regenerate-initrd
  touch /run/regenerate-initrd/all
fi 

[1] https://github.com/openSUSE/nvidia-driver-G06/issues/25

So seems if lsinird fails initrd doesn't get recreated either. With that
modprobe.d snippet to blacklist nouveau isn't being added to initrd either and
nouveau remains in initrd. So this gets loaded before nvidia drivers can be
loaded in the system.