Now, I like the choice I get on the login screen for the various window
managers (as well as three guest-restricted access selections!).
However, I'd like to change the login screen back to the Ubuntu look and
feel. I don't know if this is just a theme setting, or something more.
I launched the application System --> Administration --> Login Screen
Settings, but all choices on this screen are grayed out, and the Unlock
button doesn't do anything.
Finally, I'm getting a password dialog after logging into Ubuntu about
unlocking password keyring. Any way to get rid of this dialog?