Rhino 6 all viewports black - newest intel driver and nvidia drivers up to date

Rhino Rhino for Windows
1

Hi there, with below specs and newest drivers installed I have black viewports in rhino6. Any idea’s of a fix?

Intel® HD Graphics 620
OpenGL version: 4.5.0 - Build 24.20.100.6194
Render version: 4.5
Shading Language: 4.50 - Build 24.20.100.6194
Driver Date: 6-20-2018
Driver Version: 24.20.100.6194

Maximum Texture size: 16384 x 16384
Z-Buffer depth: 24bits
Stencil depth: 8bits
Maximum Viewport size: 16384 x 16384
Total Video Memory: 1 GB

2

I switched rhino to use my nvidia card, no it works. But before it alwasy worked with the intel card…

NVIDIA Corporation
GeForce 940MX/PCIe/SSE2
OpenGL version: 4.6.0 NVIDIA 398.36
Render version: 4.6
Shading Language: 4.60 NVIDIA
Driver Date: 6-24-2018
Driver Version: 24.21.13.9836

Maximum Texture size: 16384 x 16384
Z-Buffer depth: 24bits
Stencil depth: 8bits
Maximum Viewport size: 16384 x 16384
Total Video Memory: 2 GB