Still no luck with 1.20...
What's the difference between Arch, where it runs:Graphics: Card: NVIDIA G92 [GeForce GTS 240]
Display Server: x11 (X.Org 1.20.0 ) drivers: nouveau (unloaded: modesetting,fbdev,vesa) Resolution: 1920x1080@60.00hz
OpenGL: renderer: NV92 version: 3.3 Mesa 18.1.1
and Siduction, where it doesn't:Graphics: Card-1: NVIDIA G92 [GeForce GTS 240] driver: nouveau v: kernel
Display: x11 server: X.Org 1.19.6 driver: modesetting unloaded: fbdev,nouveau,nv,vesa resolution: 1920x1080~60Hz
OpenGL: renderer: NV92 v: 3.3 Mesa 18.1.2
Is it this "driver: modesetting" and if yes, where can it be changed to the arch way?