Comment # 7 on bug 907393 from Antoine Saroufim

There you go. I deleted some of the log parts when it comes to gnome-session
due to privacy. 
I don't think that would matter though.
https://dl.dropboxusercontent.com/u/44544435/log.txt
Also, I came across this, it might be helpful:
https://bugzilla.redhat.com/show_bug.cgi?id=670964