Hello everyone, I'm new to this whole Linux thing.. I just installed Ubuntu on a new Laptop Toshiba Satellite C55-A.
I'm using the KDE desktop and from time to time I see random graphic glitches. Also sometimes the machine locks up at random.

Here is an atteched img of the problem.
Does anyone know what this might be?

KDE graphics glitch.jpg

Thin grey boxes at the top of my screen that flash quickly.
Thanks Everyone! : ]