I just made a Xubuntu 64-bit system using VirtualBox and I can only log in with guest, when I try to login with my account it just stays in the login screen.
I've seen a similar question (Ubuntu gets stuck in a login loop) but I can't apply any of the answers as I get into a loop too when I try to log in one the Ctrl+Alt+F1 console.
Obviously I can't use sudo to install the guest additions CD image as I can only do it from guest account.
Any idea?