I'm having some problems getting my composite manager (cairo-compmgr) to start up with X when using LightDM. The Arch wiki recommends putting it in .xinitrc (<a href="https://wiki.archlinux.org/index.php/Cairo_Compmgr#Configuration">https://wiki.archlinux.org/index.php/Cairo_Compmgr#Configuration</a>), but neither that nor .xsession seem to run when I log in. What's the recommend way to start a program when X starts when using LightDM? I have a feeling this question comes from my own lack of general knowledge around LightDM and X sessions, so please feel free to point me towards some better reference documentation. I tried looking up docs on X, but I had a hard time finding one centralized location that gave me an introduction to the terms and concepts I should know when dealing with X. Thanks, Jonathan