I changed my main user's ID from 1000 to 999 and now it no longer shows on the login screen. I expected it not to show, but I also expected the login screen (the default that ships with MATE/Mint 16) to be "smart enough" to show a box where you can manually type in a username if there are no users over 1000 to list. It isn't.
Is there a way to change to a different login theme that will allow a username to be entered (from the command line, because I can't log in graphically!)? Is there a way to make the login screen show a username prompt? Maybe some hidden hotkey combination?
I can use CTRL+ALT+F2 and login and run
startx, but the DE response is brutally slow, and it doesn't have the login screen chooser on the menu when MATE is started that way.