Bug#913277: "FATAL_ERROR: No valid sound driver! FATAL_ERROR: Server exited!"

[Awtul]

Package: moc
Version: 1:2.6.0~svn-r2984-1
Followup-For: Bug #913277

In fact, what are we doing exactly when linking 
'/usr/share/alsa/alsa.conf.d/pulse.conf' file
and '/etc/alsa/conf.d' directory?