Bought iBook G4 12" 1.2 mHz, with CD burner in it. Problems with it recognizing discs, and now get this error. Says drive not supported. Tried resetting PRAM, NVRAM, etc.
When is the last time you cleaned that CD drive with a CD cleaner and using compressed air? Plus with such and old Mac you may have to replace it and you can get a guide at iFixIt.com.