So I rented some movies on DVD from library but most of them couldn’t be read on my laptop. It was fine when I had windows 7 on it, so I guessed it must be from Ubuntu. I was right!
Following the instructions on this page, and then installing this package:
ubuntu-restricted-extras, and after that using VLC player resolved the issue totally.
2. sudo /usr/share/doc/libdvdread4/install-css.sh
sudo apt-get install ubuntu-restricted-extras
sudo apt-get install vlc
Omid Hezaveh lives and works in Helsinki find him on twitter