hauhauha eu nem sabia o que era um dvd9, pesquisei, pesquisei e acabei encontrando uma solução, tente instalar o dvd+rw-tools
sudo apt-get install dvd+rw-tools reeinicie (ou feche e abra) o k3b (deve funcionar) fonte: http://k3b.plainblack.com/requirements KDE >= 3.2 - KDE is the great window manager, the powerful desktop, the very powerful c++ library K3b is based on, and a lot of programs. QT >= 3.2 KDE 3.2 requires the QT library version 3.2, a cross-platform GUI development toolkit. Since K3b is a threaded application QT needs to be compiled with threading support enabled. cdrecord/mkisofs - Cdrecord creates home-burned CDs with a CD-R/CD-RW recorder. dvd+rw-tools - The DVD+RW-Tools are used to burn and format DVD+R(W) and DVD-R(W) media. To enable all K3b DVD burning features version >= 7.0 is required. -- Mais sobre o Ubuntu em português: http://www.ubuntu-br.org/comece Lista de discussão Ubuntu Brasil Histórico, descadastramento e outras opções: https://lists.ubuntu.com/mailman/listinfo/ubuntu-br
