Originally Posted by travis82
Where is the right place for such file? /etc/X11/xorg.conf.d/ or /usr/share/X11/xorg.conf.d/
Just as a general point of knowledge, if you see these two types of directories (not necessarily just X11, but matching directories in /etc/ and /usr/share/, /etc/ is typically for the user to override the distro-provided /usr/share/ conf files. Keep in mind, if you edit something in /usr/share/, if you upgrade or reinstall that package, it will replace that custom file without any hesitation or prompting.
/usr/share/X11/xorg.conf.d/ - system defaults - user shouldn't normally edit
/etc/X11/xorg.conf.d/ - used by user to override system defaults