I'm a total noob guys, so please bear with me. I will try to make it as succinct as possible. Whenever I try to play some of my videos(not happening with all), regardless of the video format, there is a horizontal line of disturbance on the top of the video, usually 2-3 cm down from the top. Well, it is only noticeable when the video is in full screen mood and I have no idea how to describe the problem. I hope it is something that can be fixed easily. I googled it without luck. Is there any solution to this? BTW I am running Ubuntu 11.10 64-bit on Dell Inspiron N5050.