Judging from the fact that mount returns EINVAL, this is a kernel bug. Could you run 'lspci -v' and 'lspci -n' and post the segments corresponding to the controller driving your CD drive? You should be able to match them up by number.
** This bug is no longer a duplicate of bug 76598 cdrom not detected in feisty ** Changed in: linux-source-2.6.20 (Ubuntu) Sourcepackagename: None => linux-source-2.6.20 Status: Unconfirmed => Needs Info -- Installation-CD not recognized after keyboard-setup https://launchpad.net/bugs/96639 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs