Comment 1 for bug 25603

This is normal on Ubuntu dictibution.
I think that thay made it for security ressons, to donnot eject the driver when
in loads
To unmount and eject the CD, there are many way which are:
--- Go to Computer folder from Nautilus and right click on your mounted CD-Rom.
--- As you wrote, you can use "eject /media/cdrom" or even if it doesn't
respond, use "sudo eject /media/cdrom" to force the eject emediatly
--- Another way is IF you actiated mounted devices and folders on your desktop,
right click on the CD-Rom and eject it.

It is necessary to close all the programms that use this driver (Media players
e.t.c.)