Upgrade from 13.37 to 14.0: Sound Lost

   The Sony Vaio was upgraded from 13.37/x86_64 to 14.0/x86_64 and the only
capability lost is sound. 'which alsamixer' returns /usr/bin/alsamixer but
trying to run alsamixer in a virtual console returns 'no such file found.'
The sound icon on the Xfce4 panel is greyed out, too, and will not respond
to a right click.

   I have not installed the latest multilib, 32-bit compatibility modules. Is
this the problem?

   A clue stick will be very helpful. I'm now stymied but confident the
solution is something very simple that has not occurred to me.

Rich