I use Xubuntu for quite a few years now. I never changed the basic xfce setup.
And I keep reading that (x)Ubuntu defaults to Xorg. And I keep reading solutions for graphics issues that involve editing /etc/X11/xorg.conf
No Xubuntu installation I did ever had a default /etc/X11/xorg.conf, also not 22.04 LTS. It does have /etc/X11/ and /etc/X11/xorg.conf.d/, but just no xorg.conf file.
Can some please explain why that is?
/etc/X11/xorg.conf got deleted in Ubuntu (not sure about Xubuntu) well before 2010 as a configuration file but if present will be parsed. This log file became too large and mistakes in the file where often lethal.
/etc/X11/xorg.conf.d/ is the new way (but also at least 15 years old so not really new) to use configurations (not just for xorg.conf.d). Files in there are small, so easier to evaluate, and are processed in ASCII order so someone can manipulate when parts are processed. A misconfiguration in one of these files does not have to be lethal as that part can be skipped with a warning.
See also: 50-synaptics.conf options not working
/usr/share/X11/xorg.conf.d/ might have the files you are looking for. You can copy those over to /etc/X11/xorg.conf.d/
