[ubuntu] vlc flicker problem

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http://ubuntuforums.org – hello i duel boot windows 7 64 bit / 12.04 lts I tested a file that is 1080p full hd video quality. At the top of the video when using vlc it flickers like its skipping video frames. When i booted into windows 7 and ran the same file it was flawless perfect video playback so i am ruleing out a hardware issue. also with movie player it does not play sound. I tryed loading same file with dragon player and it flickers at the top too. Could this be a driver issue and how do i get sound back to movie player. thanks for looking at this post. (Hardware)