sudo apt purge nvidia-dkms-390 successful in also removing nvidia-driver-390*.
However, sudo apt install nvidia-driver-390 results in same error condition of
"Errors were encountered while processing:
nvidia-dkms-390
nvidia-driver-390
E: Sub-process /usr/bin/dpkg returned an error code (1)
"
sudo apt purge nvidia-dkms-390 successful in also removing nvidia-driver-390*.
However, sudo apt install nvidia-driver-390 results in same error condition of
"Errors were encountered while processing:
nvidia-dkms-390
nvidia-driver-390
E: Sub-process /usr/bin/dpkg returned an error code (1)
"