I am having this problem since Karmic and every alpha release of Lucid. Unmarking Gnome Login sound in startup applications does not mute it at startup. I just hate the login sound and Ubuntu startup should, its redundant and freaks out the person sitting besides you. The only solution is removing the login sound file. How i can submit a bug and what packages do i need to submit? Do you have the same problem. I have a Dell E1505.