The system is running in low graphics mode (nvidia drivers)

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http://askubuntu.com – I have gone through countless threads on the following error and none have helped. Your screen, graphics card, and input device settings could not be detected correctly. You will need to configure these yourself. I have nvidia graphic cards and have tried countless things but nothing works. This pops up every time I reboot. The computer was running fine then all of a sudden it crashed and I got this error. Any ideas? (HowTos)