There is an issue with my elementary os desktop. I get to the login and enter my password, and I have to wait a long time. Sometimes it feels like two minutes just with the wallpaper waiting for the desktop to load. Any ideas on how I can diagnose the issue? I have a lot of non-app center apps installed, and I'm thinking it may be one of them, but I don't know the best way to see what's going on immediately after login. Thanks!