I just tried with the latest Dapper kernel (2.6.15-21) and have the same problem. I can't reproduce the problem in Windows, so Plextor will not look into whether it's a firmware problem.
-- Plextor DVD-RW does not detect DVDs properly until an audio CD is inserted https://launchpad.net/bugs/27316 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs