Installed updates last night via Update Manager and nvidia-driver-390 (390.116) fails to load during boot. If I switch to xserver-xorg-video-nouveau those drivers load successfully. Results of nvidia-bug-report attached.
nvidia-bug-report.log.gz (58.8 KB)
Appears to be issues with kernel version 5.3.0-26, edit GRUB_DEFAULT to load the previous stable kernel.
sudo apt-get purge nvidia*
sudo nano /etc/default/grub
GRUB_DEFAULT="1>2"
sudo update-grub
restart
System Settings > Driver Manager > nvidia-driver-390 > Apply
restart