I postponed working on this till after holiday season was over. I got a solution now, which I post here in case anybody else is affected. I found the solution in the following link and I restate here a summary of the steps.
I am not expert at all, but essentially, there is a mismatch in the version numbers of the Nvidia drivers in the kernel and the driver module (as the original error states). The proposed solution is to revert to an earlier version of the nvidia driver. Here are the command line steps.
In my case, this produced an error like “could not find any typelib appindicator 3”, which I resolved by
apt-get install gir1.2-appindicator3-0.1
The output of “jockey-text -l” was
xorg: nvidia_304 - NVIDIA accelerated graphics driver (Proprietary, Disabled, Not in use)
xorg:nvidia_304_updates - NVIDIA accellerated graphics driver (post-release updates) (Proprietary, Enabled, In use)
xorg: nvidia_319_updates - NVIDIA accellerated graphics driver (post-release updates) (Proprietary, Disabled, Not in use)
To revert to the previous Nvidia
sudo jockey-text -e xorg:nvidia_304
As a final remark, my feeling is that this happened, because I had to disable the repositories for Netrunner Dryland-SE (4.2), since they were down. Is that possible? See the related post here: