I am newbie to ubuntu, as well as so far I love it! But, my external DVD hp-840 is not operational any longer. It works very well on my dell laptop...and it did work on this PC aforementioned to installing ubuntu. It isn't even being known below "my places". I have tried unplugging the drive plus plugging it back in....but it is never identified. The drive will open up the tray to accept or else drive out a disk. If someone has any suggestion of what might be mistaken, otherwise what I need to do to make it work it would be very much valued.