Is xorg.conf.d no longer used by Arch Linux? If so, does anyone know where the configuration files that once lived under said directory now reside?
It seems that Arch Linux no longer places the default config files in
/etc/X11/xorg.conf.d, it now leaves that wholly to system-specific (user-made) config files.
Note: Arch supplies default configuration files in /usr/share/X11/xorg.conf.d, and no extra configuration is necessary for most setups.
Xorg uses a configuration file called xorg.conf and files ending in the suffix .conf for its initial setup: the complete list of the folders where these files are searched can be found at  or by running man xorg.conf, together with a detailed explanation of all the available options. Using .conf files The /etc/X11/xorg.conf.d/ directory stores host-specific configuration. You are free to add configuration files there, but they must have a .conf suffix: the files are read in ASCII order, and by convention their names start with XX- (two digits and a hyphen, so that for example 10 is read before 20). These files are parsed by the X server upon startup and are treated like part of the traditional xorg.conf configuration file. The X server essentially treats the collection of configuration files as one big file with entries from xorg.conf at the end. Using xorg.conf Xorg can also be configured via /etc/X11/xorg.conf or /etc/xorg.conf. You can also generate a skeleton for xorg.conf with: