Comment # 18 on bug 1089116 from Bit Juggler

(In reply to Michal Srb from comment #17)
> ...
> As far as I can tell, these errors are harmless (should be considered as
> warnings).
> ...

Thank you very much for the detailed explanations on all the "(EE)" lines i can
see in my Xorg.0.log file.

So you are sure that my problem is not related to the X-Server.(?)

(In reply to Michal Srb from comment #17) 
> So now with the patched X server you were able to boot and get to console
> without crashing. If you proceed with the bumblebee setup, do things work
> right?

No! I only get a black screen but i can switch to a console (Crtl+Alt+Fx).
There i checked for Bumblebee errors but can't find any.

(In reply to Michal Srb from comment #17) 
> If not, the bug is assigned to bumblebee maintainer.

Is there one?

Up to now there was no response (although openSUSE Leap 15.0 hits RC phase this
week).

Are there any other tools to deal with NVIDIA OPTIMUS (instead of using
bumblebee)?