Hi, thanks for the solution. I'm using Ubuntu 18.04 with a NVidia GTX 1050 on my laptop.

I added the 2 lines and my VMs started again.

BUT there is a big performance drop with 3D. To test 3D/OpenGL, I'm using under my Windows 7 guest the "GPU CAPS Viewer" utility, and where some tests showed hundreds of FPS before with v16.1.2, now it goes from 30 to 80 FPS only    --- I'm using a VM just for Photoshop, and some functions are now a bit choppy sometimes, so 3D/OpenGL support is essential to me. Or Vulkan if it could work !

Speaking of it : I DO have the vulkan functions enabled (and tested), but setting mks.enableVulkanPresentation=TRUE just results in a crash.