Ubuntu Dapper: cannot play uncrypted DVDs

[Luca Manganelli]

On 3/11/06, Tristan Wibberley <maihem at maihem.org> wrote:
> If you are using the auto start feature to play the DVD, go to
> System->Preferences->Removable Drives and Media, go to the Multimedia
> tab, and change "totem %d" to "totem dvd://" in the Video DVD Disks
> section. I believe this is a bug in gnome-vfs, but I'm not sure how to
> handle multiple DVD drives correctly.
>
> If you are trying to use the play disk feature from the totem Movie
> menu, use open location and type the uri dvd://

Totem reports me this error:
"The source seems encrypted, and can't be read. Are you trying to play
an encrypted DVD without libdvdcss?"

but I have libdvdcss installed