Comment 47 for bug 984785

what is your lightdm version? mine 1.2.1
if i do `ps -ef | grep lightdm` while writing this post i get:

root 1108 1 0 May23 ? 00:00:00 lightdm
root 15862 1108 4 May23 tty7 00:04:14 /usr/bin/X :0 -auth /var/run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch
root 15916 1108 0 May23 ? 00:00:00 lightdm --session-child 12 25

there's already `--sesion-child` running as root. i couldn't find documentation anything else that running `lightdm --session-child` myself:

Usage: lightdm --session-child INPUTFD OUTPUTFD

it exits with value 1 "if (argc != 4)"
looking at source code of lightdm 1.2.1 those two integers stands for "from_deamon_output" "to_deamon_output"

running `lightdm --test-mode` on pts gives me the same Xephyr requirement, but running it on tty says:
"Failed to get D-Bus connection"

if i build ps tree `ps -ejH`:

  PID PGID SID TTY TIME CMD
 1108 1108 1108 ? 00:00:00 lightdm
 1163 1163 1163 tty7 00:06:39 Xorg
 1931 1108 1108 ? 00:00:00 lightdm
 1962 1962 1962 ? 00:00:00 sh
 1991 1991 1991 ? 00:00:00 ssh-agent
 2008 1962 1962 ? 00:00:00 xscreensaver
 2010 1962 1962 ? 00:00:00 xfce4-session

which bring me back to questioning xauth. Xorg to be more specific. Don't know why my gut says it's not lightdm..
Also - why last four processes goes under lightdm tree? from logic by process name ok, but from parent pgid logic..?

(i'm writing this post offline. second day)
so i thought let's try good old `kill -9` and what i discovered - killing lightdm doesn't do anything besides hanging the pc, but killing Xorg (in pts hangs, in tty restarts gui interface in pts) and both ways killing Xorg creates the file!