An update: running the "lsblk" command line tool the CDROM gets magically automounted. I think that this provide usefull information on finding the bug in udisks daemon.
** Attachment added: "updated udisks monitor" https://bugs.launchpad.net/ubuntu/+source/udisks/+bug/988907/+attachment/3105281/+files/udisks.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/988907 Title: multiple LUNs usb disk drive does not mounts CDROM LUN on 12.04 (works on 11.10 and older) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/udisks/+bug/988907/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs