Configuration GDM Servers Sound Ubuntu Disable Sound in GDM Introduction If like me, you want to have Ubuntu as silent as possible, you need to disable the startup sound in GDM. Command 1sudo -u gdm gconftool-2 --set /desktop/gnome/sound/event_sounds --type bool false Resources https://www.webupd8.org/2009/10/turn-off-login-sound-in-ubuntu-karmic.html