[ubuntu] Installed Radeon Driver and Locked out of Ubuntu

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http://ubuntuforums.org – Hello Everyone, I am using Ubuntu x64 11.10 in my HP pavilion g6-1037tx notebook. Everything was working fine with VGA mode as it didn't recognize my Radeon 6470 HD graphics card. Then, I downloaded radeon driver 11.12 from their website and installed it. Everything was working fine until I turned off my notebook. When I tried to boot up the next day, my laptop freezes in both normal mode and recovery mode. I tried booting up (previous versions) in my boot menu, but same problem. What can I do to recover my Ubuntu without doing fresh installation. (Hardware)