I have the same with my Serial ATA CD drive on my Dell Inspiron 630m. Works fine with Breezy and Dapper, but doesn't after installing Edgy a week or so back. hal can't see the disc, but sees the drive fine.
** Changed in: hal (Ubuntu) Status: Unconfirmed => Confirmed -- hal does not detect media change in USB-DVD-Drive https://launchpad.net/bugs/56484 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs