I debugged this a little with Cimmo (from bug 14692): with the Dapper kernel he did not have a problem, but the effect occurs on Edgy (and on Windows XP there is no problem). This makes the firmware bug theory even less likely...
-- Plextor DVD-RW drives do 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
