NVIDIA Stereo Vision on ubuntu 18.04

Hi, i had NVIDIA Stereo Vision on Ubuntu 16.04 working using the Stereo 10 Option and Composite Disabled in the xorg.conf This did not work on unity/gnome but it worked on xfce4.

After i updated to ubuntu 18.04 the screen stays blank if i have the composite still disabled. I also tried ubuntu-mate and gdm3 instead of lightdm. But always i get either a blank screen if composite is disabled in xorg.conf. If i enable it everything is working except stereo vision.

Has anybody, especially from the nvidia team any suggestion?