According to this post : http://forum.ubuntu-fr.org/viewtopic.php?pid=2595566#p2595566 You could see, if you understand french language , that the main problem is the brasero library. After remove "libbrasero-média-0" the dvd reader works fine !!!
I guess you can confirm that bug in the package "libbrasero-media-0" Regards -- the system freeze when I insert an audio cd https://bugs.launchpad.net/bugs/367767 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
