I have noticed that if I choose to log into a "steambox session" it will then set my display manager to autologin and I will be unable to log out. I haven't found any way around this, so if anyone has any idea on how to stop it, please let me know.
Note: With both KDM and LightDM, after logging into a steambox session I have been unable to log out, due to autologin being on.
Also interesting, my PS3 controller seems to only be detected in steambox session, not if I open up big picture mode in another DE. Currently due to frustration I choose to not use a log in manager at all.
Which brings me to another question, is there a way that I can start a steam session with startx? If I can do that I will just write my own little login manager. Thanks.