OpenSuse Leap 15.1 no longer boots in graphical mode

When I start my system, I regularly get messages about some updates from this applet somewhere down to the right on the panel. Don’t know its name, nor what its function is since I already have Yast that can do updates.
Today, I saw there was a kernel update. I applied it and when I rebooted, I got no graphical login screen any longer.
Maybe it has something to do with the fact that for months I installed the nvidia drivers ‘the hard way’ by compiling them against the kernel sources.
Since a few weeks I use the nvidia drivers from the nvidia repository. They should update automatically with every kernel update, which is easier than doing it ‘the hard way’ every time my kernel updates.
Was this the first kernel update since then and did the system somehow get confused?

Some help would be welcome.

My present kernel is 4.12.14-lp151.28.36-default

Forgot to tell that the command

systemctl get-default

yields this result:

graphical.target

Well, things worked again after booting into the older kernel 4.12.14-lp151.28.32-default and then upgrading via Yast to the new kernel.
In wonder what went wrong when using the package manager icon down to the right on the panel. I wonder why this thing is there at all, where one has Yast to do all software updates.

Hi
Install the hard way, or just watch/wait for the updated nvidia drivers to update then install the updated kernel drivers. The process takes time to rebuild the nvidia drivers and then get them published by Nvidia.

I think some folks lock the kernel until they see the updated nvidia drivers appear, unlock the kernel and update that…

I find it far quicker the hard way and well as getting the latest driver (eg running 440.44);


pinxi -GSxxz
System:    Host: grover-os151 Kernel: 4.12.14-lp151.28.36-default x86_64 bits: 64 compiler: gcc v: 7.4.1 
           Desktop: Gnome 3.26.2 wm: gnome-shell dm: GDM Distro: openSUSE Leap 15.1 
Graphics:  Device-1: NVIDIA GK208B [GeForce GT 710] vendor: ZOTAC driver: nvidia v: 440.44 bus ID: 00:02.0 
           chip ID: 10de:128b 
           Display: x11 server: X.Org 1.20.3 driver: nvidia compositor: gnome-shell resolution: 1366x768~60Hz 
           OpenGL: renderer: GeForce GT 710/PCIe/SSE2 v: 4.6.0 NVIDIA 440.44 direct render: Yes