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I have a dual boot system, Ubuntu 12.04 and Windows 8.1; just an experimental spare computer, the point here being that the hardware is identical. When using IE and Windows 8.1, I can view streaming video quite nicely... task manager shows CPU usage between 20-30% and the system runs effortlessly.

On the other hand, when using Ubuntu 12.04, same site, same video, using Firefox, the playback is extremely choppy and CPU hovers between 90 and 100 percent and the system chugs along.

Why is that? Possibly a driver issue?

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