Possible Duplicate:
How to disable login sound?
I would like to know how to disable the startup sound in Ubuntu 12.04 login-screen; that is, the sound produced at the login-screen before the login.
Please note, however, the login sound is the sound produced by the system after the login. The following question covers the procedure on how to disable the login sound in Ubuntu 11.10 and earlier versions: How to disable login sound?
