1. $ sudo chown -R gdm:gdm /var/lib/gdm
  2. [sudo] password for vd:
  3.  
  4. $ sudo -u gdm gsettings set org.gnome.desktop.sound event-sounds false
  5.  
  6. ** (process:28766): WARNING **: Command line `dbus-launch --autolaunch=b6e7b648e27de6d3e62e67ac00000009 --binary-syntax --close-stderr' exited with non-zero exit status 1: No protocol specified\nNo protocol specified\nAutolaunch error: X11 initialization failed.\n
  7.  
  8. ** (process:28766): WARNING **: Command line `dbus-launch --autolaunch=b6e7b648e27de6d3e62e67ac00000009 --binary-syntax --close-stderr' exited with non-zero exit status 1: No protocol specified\nNo protocol specified\nAutolaunch error: X11 initialization failed.\n