DMA

[Sean Hammond]

I often find that DMA is disabled by default on machines running
Ubuntu, and that in order to (for example) play DVDs smoothly I have
to enable it following these instructions:

https://wiki.ubuntu.com/DMA

This is on machines which would play the same DVDs smoothly in
Windows. And this happens very often. So, I'm not so sure that:

> DMA is activated by default for those people whose
> hardware can take advantage of it, and deactivated by default for those
> which can't.