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I am having a problem by which after I install Ubuntu 12.04 64bit it shows that my display breaks and shows nothing. I tried Ubuntu 12.10 64bit and it worked, but after updating it. The display breaks also.

My machine system requirment is :-

Core i5 4GB RAM 1.5 TB Hardisk Graphics : ATI 6850.

My guess is that there is some sort of software incompatablity between the gaphics card and the system. either the driver or the kernal?

Please advise me on how to fix it. And thanks.

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