After a forced termination of Ubuntu (battery on laptop died while on suspend mode) the screen seems to flicker a little bit. It is not a very intense flicker, more like a rectangular of 3 fingers width that flickers while the rest of the screen, the center part, works properly.
I'm a starter user so I want to know how to check the drivers or make a repair. It doesn't really seem like a hardware issue.
My graphics card model is Radeon HD 6520G and I can't find any support for it