I have recently upgrade to Ubuntu 13.04 64 bits and now I can't save nothing to CD. The CD is mounted automatically when I introduce a CD-ROM but in gnome-disks shows:
$ dmesg | grep sr0
sr0: scsi3-mmc drive: 48x/48x writer dvd-ram cd/rw xa/form2 cdda tray
sr 18:0:0:0: Attached scsi CD-ROM sr0
sr 18:0:0:0: [sr0] CDB:
$ ll /dev/sr0
brw-rw----+ 1 root cdrom 11, 0 may 3 17:23 /dev/sr0
When I use Brasero or K3B, apparently they save the files to CD but when I mount the used CD-ROM, it contains nothing. For example, I try to create an audio CD with several MP3 files and this is the output of K3b: debug output of k3b