As configurações de som são perdidas no painel de configurações. Eu tento iniciá-lo a partir de um terminal com o comando gnome-control-center :
Eu já instalei o gnome-control-center:
#sudo apt-get install gnome-control-center
Reading package lists... Done
Building dependency tree
Reading state information... Done
gnome-control-center is already the newest version (1:3.18.2-1ubuntu6).
0 upgraded, 0 newly installed, 0 to remove and 9 not upgraded.
valeriy@valeriy-HP-ProBook-450-G5 ~ $
E quando eu lanço o som do gnome-control-center do console, eu tenho as próximas mensagens:
# gnome-control-center sound
** (gnome-control-center:11036): WARNING **: Couldn't connect to accessibility bus: Failed to connect to socket /tmp/dbus-ljc9eyj0jN: Connection refused
** (gnome-control-center:11036): WARNING **: Ignoring launcher landscape-client-settings (missing desktop file)
** (gnome-control-center:11036): WARNING **: Ignoring launcher language-selector (missing desktop file)
** (gnome-control-center:11036): WARNING **: Ignoring launcher software-properties-gtk (missing desktop file)
** (gnome-control-center:11036): WARNING **: Ignoring launcher ubuntuone-installer (missing desktop file)
** (gnome-control-center:11036): WARNING **: Could not find settings panel "sound"'