sound barely audible with Fedora 11 on an HP HDX 16

[Kevin Kempter]

Hi all;

I have installed Fedora 11 on a new hp HDX 16 for my son. Playing mp3's is low 
but passable, playing DVD's the sound is barely audible. 

The hp laptop has what appears to be a nice set of altec-lansing speakers 
built in.  I assume they can output much more volume.

Anyone have any thoughts per debugging this?

Thanks in advance