I have the same problem with the feisty hord1 x86 Destop CD.
This problem is not limited to Ubuntu but is a general kernel problem in the >= 2.6.18 kernel series. They introduced a new error handling for libata which disables my DVD drive at boot (I have the same Pioneer model as you on a Dell I6000 notebook with intel 915gm chipset). Maybe this problem was fixed in kernel 2.6.20rc2 - I didn't have the chance to test it yet.
I have the same problem with the feisty hord1 x86 Destop CD.
This problem is not limited to Ubuntu but is a general kernel problem in the >= 2.6.18 kernel series. They introduced a new error handling for libata which disables my DVD drive at boot (I have the same Pioneer model as you on a Dell I6000 notebook with intel 915gm chipset). Maybe this problem was fixed in kernel 2.6.20rc2 - I didn't have the chance to test it yet.
For more information confer e.g. http:// bugzilla. kernel. org/show_ bug.cgi? id=7608
There is still enough time to get this fixed upstream and include a working kernel in feisty I'd say ;)