Bug#558480:

[Roland Baudin]

The package freedesktop-sound-theme is installed and I don't have any 
system sounds, except some exclamations in some applications.

Le 29/11/2010 09:19, Josselin Mouette a écrit :
> Le samedi 27 novembre 2010 à 15:28 +0100, Roland Baudin a écrit :
>> Yes, same problem here. Where are the system sounds in Gnome?
>> There is no way to select them and moreover sounds related to user actions
>> (click, open drawer, etc.) are completely gone.
>
> You need to install freedesktop-sound-theme.
>