Yesterday, I left my notebook on sleep mode for a couple of hours. After I opened the lid, the screen kind of flicked once, and all of a sudden, the mouse looked as if it was blurred out. When I moved the mouse to open a folder on my desktop, it seemed as if if the folder was blurred out too with different colors. After a couple of seconds, it went away. I closed and opened the lid a couple of times just to make sure it didn't repeat itself and it didn't came back. Could this just be a bug?