I am also having this problem. The drive in question is a Matsusushi CD-RW and is the second drive on the IDE cable (the first is a DVD-ROM drive). I'm afraid I don't have any more information about it right now as I'm not using the machine in question.
-- CDROM drive eject disc after randomly seconds of use https://launchpad.net/bugs/47516 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs