Ubuntu 18.04 software update to nvidia 435 drivers Now i think drivers don't load, NVIDIA-SMI has failed

I am using ubuntu 18.04. This morning I ran software updater, including nvidia drivers 435.
According to the additional drivers tab I am running nvidia-driver-435, but I cant see my second monitor, and nvidia settings don’t come up and nvidia-smi says NVIDIA-SMI has failed because it couldn’t communicate with the NVIDIA driver. Make sure that the latest NVIDIA driver is installed and running.
I’ve tried several fixes mentioned in this form, no luck.nvidia-bug-report.log.gz (146.8 KB)