F21 on Lenovo production - no audio when there was during beta

[Robert Moskowitz]

I just noticed that I have no audio on my Lenovo x120e with F21 and 
Xfce.  I tested this during the beta (but do not remember which beta 
release) with VLC and listened to a mp4 lecture.

Now nothing, and the Xfce audio panel reports:  'No valid device and/or 
element'.

I rebooted, just to be sure that all the suspends I had done since the 
last boot was not at fault, and still no audio.

How do I troubleshoot this one?

BTW, the reason I did test audio during beta, was on my other Lenovo 
x120e with F20 and Gnome, I only had audio through the headphones, so I 
wanted to be sure that things were at least the same if not better (that 
is the speakers worked).

Oh, and audio works fine on my Asus ee900 with F21/Xfce.