I had this problem too. However, I suspected that the dvd was protected, so I tried a dvd that I burnt myself, which worked.
I already had libdvdread3 installed, but I needed to install libdvdcss2 via Medibuntu:
https://help.ubuntu.com/community/RestrictedFormats https://help.ubuntu.com/community/Medibuntu
This solved the issue on Hardy 8.04, brasero_0.8.1-0ubuntu2~hardy1_i386
I had this problem too. However, I suspected that the dvd was protected, so I tried a dvd that I burnt myself, which worked.
I already had libdvdread3 installed, but I needed to install libdvdcss2 via Medibuntu:
https:/ /help.ubuntu. com/community/ RestrictedForma ts /help.ubuntu. com/community/ Medibuntu
https:/
This solved the issue on Hardy 8.04, brasero_ 0.8.1-0ubuntu2~ hardy1_ i386