Improving stuttering during flash video playback - Problem: You have a CPU that supports dynamic frequency scaling and you experience dropping frames or sound stuttering during flash video playback. By default the CPU governor in Ubuntu is set to 'ondemand'. It appears that the ondemand governor does not always scale up as needed. What is ondemand ? HowTo Speed-up Flash on Firefox, Karmic. Macromedia Flash Resources and Tutorials. Tutorials.