Comment # 9 on bug 1012197 from Markus Elfring

(In reply to Wolfgang Bauer from comment #8)
> Does it work if you allow to run Xorg as root?
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> And/or try to add the user sddm to the "video" group:

I do not want to change these settings.


> The sddm greeter runs as unprivileged user sddm, but needs to have access to
> the hardware. Without nvidia, this should be taken care of by the system

It worked also together with software from the script
���NVIDIA-Linux-x86_64-367.57.run��� for some days before I was informed (and
became aware) about the error message ���Failed to create OpenGL context for
format QSurfaceFormat(version 2.0, ���)��� (and corresponding stuff).

Another login try with the software ���Simple Desktop Display Manager Greeter
0.14.0-2.1��� failed today. So I switched to an other greeter from a display
manager alternative.