[ubuntu] Dual boot Ubuntu 12.10 and Windows 7, no longer able to start Ubuntu

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http://ubuntuforums.org – Hi all, I have installed Ubuntu 12.10, dual booting with Windows 7 on my Lenovo x120e. Everything was working fine until windows installed a series of updates. Now, I get grub when I turn on the computer, but if I select Ubuntu the screen turns black and nothing happens. If I log in to Ubuntu using recovery mode, I can get to Ubuntu. I have tried using recovery mode to repair grub (it says this is successful), but it did not remedy the problem. I am still able to log into windows just fine. I've tried google and forum search but can't seem to find someone having a similar proble (Hardware)