My setup is: Ubuntu 16.04 with kernel 4.8.0-45, Nvidia proprietary drivers 375.39 from ppa on GeForce GTX 960, Display 1680x1050
The problem is when I wakeup from suspend. The windows have border with artefacts like on picture. The only solution is to restart lightdm service by:
sudo systemctl restart lightdm.service #restart Xserver
but this kills my open apps. Open source drivers works fine.