/etc/X11/Xsession.d

hirasawa@ubu1204:/etc/X11/Xsession.d$ pwd
/etc/X11/Xsession.d
hirasawa@ubu1204:/etc/X11/Xsession.d$ 
hirasawa@ubu1204:/etc/X11/Xsession.d$ ls | sort
00upstart
20x11-common_process-args
30x11-common_xresources
35x11-common_xhost-local
40x11-common_xsessionrc
50x11-common_determine-startup
55gnome-session_gnomerc
60x11-common_localhost
60x11-common_xdg_path
60xdg-user-dirs-update
65compiz_profile-on-session
70gconfd_path-on-session
70im-config_launch
75dbus_dbus-launch
80appmenu
80appmenu-gtk3
80im-switch
81overlay-scrollbar
90consolekit
90qt-a11y
90x11-common_ssh-agent
99upstart
99x11-common_start
hirasawa@ubu1204:/etc/X11/Xsession.d$