Comment 10 for bug 782389

my old compaq presario F700 has the same problem. With ubuntu 11.04 64bits unit was not recognized, but with 32bits version it shows up again. The problem is that I switched to xubuntu 11.04 32 bits and the problem persists.
Also I must say that when ubuntu 11.04 32b version was installed the dvd drive was ok until I decided to test the ubuntu-restricted-extras package: the drived disapeared and appeared again after I removed that package.
Might be some problem related to the multimedia codecs ??

Hope this helps