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I installed Ubuntu 11.10 today. Everything went fine. But when the system starts up, I cant see the Log in screen. I just see a pink screen. If I type the password, i hear the sound of the logging in, but the pink screen remains.

Previously I had an Nvidia 9400GT graphics card. It worked well. Now i upgraded the graphics card to ATI Radeon 6850. I can no longer use ubuntu. Have tried reinstalling ubuntu so many times. It doesnt seem to work.

What should i do to solve this problem?

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Are you able to login from the terminal? Press CRL-ALT-F1, login, and then start a new x screen. I think you do this by typing xinit -- :2. Now type unity and see what happens. I may have not told you these steps perfectly, so tell me if they don't work. – bntser Jan 2 '12 at 15:44
This question appears to be abandoned. Unaccepted answer or unanswered, could you perhaps add more detail to your question? If this question no longer applies then you can either delete it or answer it yourself if you've solved the problem. Flagged for deletion. Thanks! – Ringtail Jan 13 at 2:33

closed as too localized by Ringtail, Eliah Kagan, fossfreedom♦ Jan 13 at 11:05

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