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I installed an Ubuntu 12.04 from CD, then upgraded the device driver for my nvidia FX 1800 from the "additional drivers" section at "system settings". After rebooting my desktop screen turns to blank after a quick splash of Ubuntu boot image. Now key stroke response, ctrl-alt-FX doesn't work.

I can hit shift to enter recovery mode. Inside that mode what shall I do? Thanks.

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marked as duplicate by Eric Carvalho, Braiam, karel, minerz029, Florian Diesch Dec 1 '13 at 19:04

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