PROBLEM SUMMARY: Upgraded from 16.04 to 18.04 and 2nd monitor, HDMI, does not connect. I've used Ubuntu for 10+ years, am Linux certified, but I've never had a problem this obtuse. The possible video configurations for 18.04 are very confusing.
STATUS:
About a month ago I "upgraded" from 16.04. The quotes are because it was a fresh install, and I preserved my /home directory.
The 2nd monitor is HDMI connected, and my video is Nvidia GF 108GLM [NVS 5200M] on a Dell E6430.
I've been able to get both monitors working for a week or so, but every update wipes out the setting/environment and I have to restart.
I've taken WAYLAND out of the gdm3 configuration, I've gone to completely X config, I've successfully installed the Nvidia driver, etc. It's really crazy.
These steps worked, for about a week: Display Manager gdm3 not working under Ubuntu 17.04
Any suggestions for a next step ? I've read all the posts I can find.
