I have recently upgraded to Ubuntu 18.04 and have installed a new graphics card (NVidia Geforce GTX 1070). After installing the nvidia-430 driver, I am no longer able to boot. The desktop environment freezes and pressing Alt + F2 shows the following message:
"A start job is running for hold until boot process finishes up (Xmin Xs/no limit)."
When I boot into recovery mode, nvidia-smi shows that the driver is properly installed. This happens for every version of nvidia that is compatible with the GPU (390 to 430)