[ubuntu] log in screen help

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http://ubuntuforums.org – So when ever I boot up, I get the boot logo at a pretty low resolution, and when the login screen apears I get a balck screen and my TV says "mode not suported" so I hit Ctrl+Alt+(-) or (+) and the login screen pops up, everything works fine, my nvidia driver is installed and didnt do that before installing driver....so how do i fix that ---------------------------------- SPECS: Desktop Asrock MB 8 gigs ram 4 core AMD3+ cpu Zotac gforce 210 one gig graphics Ubuntu 12.04 32bit 500gb HDD (Hardware)