Bug Description

I'm using Bionic with the new 4.15 kernel. I've been using the nvidia-384 driver with no problem for a while. Today I issued "sudo apt-get upgrade" and I was prompted to upgrade the nvidia driver to the nvidia-390. After installing the driver and rebooting, I was only able to boot in to the tty terminal. The graphical display failed to boot. I have had similar problems with nvidia driver version 390 with Arch Linux and with Open Suse Tumbleweed.