Hi all together,

as a newbie in Houdini, my first question is about the viewportshading.
If I use the high quality lightning, all turns black. I just use a torus and a pointlight above it. Working with a HP Pavillon DV7 with an AMD 7690M XT.
Also the renderoutput turns just black.
I'm sure its just a tinny problem, but how to solve? :-)

Thanks in advance.