i'm using ubuntu 15.10 64bit. I have a problem with the login screen. I can't see the login screen because login screen's resolution setting is big for my monitor. My gpu card can't read my monitor's max. resolution because my monitor has VGA input but my gpu card has dvi output so my monitor's max. resolution informations going to death on dvi-vga adapter. So i want change login screen's resolution, how to i can do it ? i bored the out of range error.