Restricted codecs to play formats such as MP3 as well as the issue of playing back encrypted DVDs is a continual problem for Linux users. Basically, in some areas they may be illegal and in others they may not. Unfortunately, without these codecs, many standard functions do not work. At this point there are three options: install the ones that may or may not be legal, buy $90 worth of software from Canonical, or buy a Dell that comes with DVD and MP3 playback. Sadly, for most of us, none of those are great options, unless you happen to be looking for a new computer.