Bug#551590: metacity: system bell inaudible in X

[Samuel Thibault]

This is a "me too".  While trying to make gdm beep somehow, I stumbled
across metacity disabling XkbAudibleBellMask, which thus makes the core
bell rerouted via some gnome daemon. Setting
/desktop/gnome/sound/event_sounds to true does work for me in my current
setup:

ii  xserver-xorg              1:7.5+7                   the X.Org X server
ii  xserver-xorg-core         2:1.7.7-8                 Xorg X server - core server

Samuel