Won't read DVD movies but will read CDs and Data DVDs

Question

Subject says it all. The iBook will read CDs and data DVDs just fine. When a movie DVD is inserted the DVD player will start up just fine but when the play button is pressed a message comes up saying the the disc is not supported. If it's a software problem where can i find the drivers to fix it.

Answer 1

Could it be the Region Codes for playing DVDs have all been used
in that machine, and so the remaining code(s) do not match the
discs you have been trying to play within it?
Or does this problem also occur when attempting to play non-region
non-commercial DVD movie discs in the computer?
If the DVD Player has run out of region codes, there is a way to
hack or change the defaults; but the one I've read about does
require the DVD player firmware to be changed for it to work.
The one I've read about (but have not tried) is named Region X.
There are limitations and details, so even after messing around
it may not work; if that is the problem in the first place.
One of these only works if you play a DVD from a "region-free"
DVD drive; so this may be an external drive, not inside the Mac.
So, if the hardware has a defect, that's one thing. If the drive
has seen too many region player changes, that's another. If
the lens is semi-dirty, it may not read or record some media.
All of these kinds of things have been noted by people online.
Sometimes a search may yield some fringe findings by folks
who've unusual issues with their equipment, if not mainstream.
Perhaps some software such as Region X for Mac may help,
if not, there may be other options if the player isn't defective.
Region X for Mac:
http://www.macupdate.com/info.php/id/13801
Good luck & happy computing!