despues de instalar ubuntu 11.10 y de descargar extras restringuidos de ubuntu no consigo que la unidad dvd lea discos de cd o dvd

[joseba]

despues de instalar ubuntu 11.10 y instalar extras restringuido de ubuntu mi unidad de dvd no lee discos

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: gnome-disk-utility 3.0.2-1ubuntu2
ProcVersionSignature: Ubuntu 3.0.0-12.20-generic-pae 3.0.4
Uname: Linux 3.0.0-12-generic-pae i686
ApportVersion: 1.23-0ubuntu3
Architecture: i386
Date: Thu Oct 20 00:02:50 2011
ExecutablePath: /usr/bin/palimpsest
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111012)
ProcEnviron:
 SHELL=/bin/bash
 PATH=(custom, no user)
 LANG=es_ES.UTF-8
SourcePackage: gnome-disk-utility
UpgradeStatus: No upgrade log present (probably fresh install)