Can't play DVD

[Chris Jones]

> libdvdnav: Using dvdnav version 1.1.11.1 from http://xine.sf.net
> libdvdread: Using libdvdcss version 1.2.9 for DVD access
> libdvdread: Attempting to use device /dev/sda7 mounted on / for CSS
> authentication
> libdvdread: Could not open /dev/sda7 with libdvdcss.
> libdvdread: Can't open /dev/sda7 for reading
> libdvdread: Device /dev/sda7 inaccessible, CSS authentication not available.

It looks like it is trying to read your / partition as though it is a 
DVD drive ...

Chris