Asus k59f boots to black screen after a simple update

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http://askubuntu.com – Sometimes(most of them), I get a black screen after the booting. It's doing that since last monday after an update. I can get to the console/terminal but it doen't want to reboot... Sometimes i get a screen with a lower resolution... And sometimes it works.. My computer it's ASUS k52F with an intel card. Thanks (HowTos)