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I'm new on Ubuntu 14.04 LTS. Looking on its resources I choose the screen amplifier (kmag??) on login screen, and now I'm not able to login and neither turn off this resource. Could someone help me?

I tried to install and remove kdeaccessibility and didn't work.

Also tried to killout this process, but it didn't work.

At last, I tried to start the graphic safe mode throught the recovery mode, but also didn't wirk showing an error.

Thanks a lot.

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