Comment 17 for bug 1098323

btw, instructions from https://help.ubuntu.com/community/RestrictedFormats/PlayingDVDs were followed and libdvdread4 is installed properly.

just installed VLC and i do not know why, but VLC plays the DVD correctly.

gnome mplayer not playing dvd yet.

workaround from comment #11 is working to make gnome mplayer play dvds correctly.

however the workaround breaks VLC. error message is:
Playback failure:
DVDRead could not open the disc "/dev/dvd1".
Your input can't be opened:
VLC is unable to open the MRL 'dvd:///dev/dvd1'. Check the log for details.

tks,
ibere