Comment 4 for bug 285054

Looks like it doesn't get run in 90consolekit at all:

if [ -z "$XDG_SESSION_COOKIE" ] && [ -x "$CK_LAUNCH_SESSION" ]; then

And here is the environment at the time of 90consolekit:

USER=ubuntu
MAIL=/var/mail/ubuntu
SHLVL=2
HOME=/home/ubuntu
XDG_SESSION_COOKIE=28e155332bba7eb66e0b852448fd7006-1224575575.81036-500983529
LOGNAME=ubuntu
_=/usr/bin/xinit
TERM=linux
WINDOWPATH=9
PATH=/usr/local/bin:/usr/bin:/bin:/usr/games
DISPLAY=:0
LANG=en_US.UTF-8
XAUTHORITY=/home/ubuntu/.Xauthority
SHELL=/bin/bash
RUNNING_UNDER_GDM=yes
PWD=/home/ubuntu