Comment 39 for bug 437429

@Paul Heidelman
Renaming the files in /usr/share/sounds/ubuntu/stereo/ is the only way to deactivate certain sounds without affecting the whole sound notification system. If you want to disable not the system-ready sound but the desktop-login sound an you do that by muting sound alerts or selecting No Sounds theme, then this will also disable any sound notifications in Empathy which is a serious problem.