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
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Installation-CD not recognized after keyboard-setup
https://launchpad.net/bugs/96639
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