For the past two days, every couple of hrs, my screen will black out, and then display a lot of error text. I tried to take a printscreen of it but it wouldnt capture it.the screen behind it, youtube facebook that sort of thing, i can still interact with, and thats what my printscreen captured. How would i go about diagnoseing this? any thoughts on what i might have broken, and need to update?

recently pulled down openjdk6, but i dont know if thats the issue or not

thanks yal in advance