Problem solved - Intel driver working!
Here is what happened: When I first installed 12.2, the installer hung. Frankly, I wasn’t impressed. I found a thread on this forum saying to use boot option ACPI=off. Still I wasn’t impressed, since of course the board offers ACPI. I followed the instructions and all installed well. Then I forgot about it.
However, installing in this way with ACPI=off had as a consequence, that this boot option was made permanent in the boot options of the system which is created. I looked though some log file and accidentally saw, that there was a bit that said acpi=off.
I edited the GRUB2 configuration changing it to acpi=on. And lo and behold, now the Intel driver works.
So I will undo all the edits in the /etc/X11/xorg.conf.d/50-*.conf (as mentioned before) so that the default behaviour is reestablished and be a HAPPY MAN!