There is at https://lists.debian.org/debian-user/2018/07/msg00059.html a problem with nvidia driver and latest 4.16.0-2 kernel, with a workaround at https://lists.debian.org/debian-user/2018/07/msg00067.html. Does this give you some help ?
- Bug#903121: xserver-xorg-video-nvidia: blank sc... Richard Levitte
- Bug#903121: xserver-xorg-video-nvidia: bla... Andreas Beckmann
- Processed: Re: Bug#903121: xserver-xorg-vi... Debian Bug Tracking System
- Bug#903121: Could it be related to this me... Erwan David
- Bug#903121: xserver-xorg-video-nvidia: bla... Andreas Beckmann
- Bug#903121: xserver-xorg-video-nvidia:... Luca Boccassi
