Two years later, this issue is still there. Removing the file .config/compiz-1/compizconfig/config solves it.
The file contained nothing but [gnome_session] profile = -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-session in Ubuntu. https://bugs.launchpad.net/bugs/1001138 Title: logging in to gnome-classic session takes over 45 seconds To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-session/+bug/1001138/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
