I had a working setup for our lab computers running SL6, so that Gnome 
sessions would auto-logout after some number of hours (since students 
would often lock and abandon sessions for days).  I'm trying to 
replicate this same behaviour under SL7, but (of course) Gnome settings 
have changed drastically since SL6.

I thought I had a solution when I followed the instructions found here:

https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Desktop_Migration_and_Administration_Guide/user-sessions.html
(Search for "logout" on the page.)

However, that setup doesn't seem to work, as my idle session stays 
locked well past the specified inactive timeout.  (And, yes, I 
remembered the "dconf update" and remembered to log out and back in.  I 
even tried rebooting, in case something was being cached.)

Has anyone come across this one?  Any ideas on how to fix it?  I'm 
coming up empty on my Google searches.

Thanks,
Gilbert