D. R. Evans composed on 2020-01-28 14:25 (UTC-0700):
The /var/log/Xorg.0.log file for configuration 3 is almost twice the size of the one for configuration 2. They are both large enough that I don't want to post them unless that will be a help. I can't say that their content is very meaningful to me.
Xorg.0.log is where X troubleshooting begins. Knowing the exact GPU model usually helps too: inxi -Gxx
run from within Konsole or Xterm.
Easiest for everyone usually is:
pastebinit /var/log/Xorg.0.log