Comment # 5 on bug 1213438 from Günter Halt

"Maybe it's better not to install more, but rather have a single clean one."

o.k. My strategy is to have a installation to work, if a new release is present
to install this on an other partition. Before the new release is the
work-release i make adaptions (own services) , install other packages ....
The old is still present. 
So i have leap15.4  still. 
This report i write with leap15.4 

Both installations leap15.5 are unworkably after execute the announced updates.

For both the basic-iso was openSUSE-Leap-15.5-DVD-x86_64-Build484.1-Media.iso

Now i installed, using the same iso, to an other hdd on the same computer.

The same result. After "starting local service" the Displaymanger shows the
user-name and -> crash (like command halt ), the Monitor is green only.

I have no idea to cleen this. 
I will try to login on konsole before crash (it is not so easy )
The difference is the online-repositories contains other packages.
If i repeat the 3. installation, i will install only from Stick.
Sorry for my English. I never learned it in the school and now i am 78 years
old.
Thank you.