Thanks in advance for any help I can get on this. I have a fresh Ubuntu server install that started from 12.04 and got do-release-upgraded a few times up to 13.10 (long story short, that was the only available method of installing). While still on 12.04, I installed Slim and Openbox for a bare-bones X environment. Everything worked fine, got some tweaks in place for OB, etc. After updating to the current release, Slim starts, but if I log in, it just hangs at a blank background and doesn't start Openbox. If I specifically select Openbox as the session, it starts, but the background doesn't change from the slim theme, and programs that normally should auto-start won't.
I've tried digging through some error logs, but haven't found anything noteworthy yet. Would anyone happen to know what to check, or at least have an idea of where I can get started?