I installed an updated version of a graphic driver and then restarted the computer to complete installation. During the next startup, the plain purple Ubuntu screen was replaced by a black screen displaying
Ubuntu 12.04.1 LTS CompaqPresario tty1 User login:
then when a login is entered a request for a password.
My user login info for Ubuntu isn't working, and neither are any of the suggested default login infos i've found here or in other forums. I've tried every possible combination of my own logins, the examples of default ones and anything else that came to mind but all were incorrect.
I've carried out a network boot from another computer running the same version of Ubuntu, and from a memory stick with Ubuntu Live but startup goes straight to the password request before any boot options appear.
Can anyone explain what has caused this and if there is someway to do a restore, stuck as I am halfway through startup? Or does anybody know which user name and password it may be requesting? Even a suggestion for some way to get around this password request and into Ubuntu or into boot options would help me out.