Sound is lost after upgrading to 7.10

[Johan Sandberg]

Hi all,

I just upgraded my Ubuntu 7.04 to 7.10 on my HP Compaq nw9440 notebook. 
Before the upgrade I had no problems with sound but after the upgrade no 
sound device is found by Ubuntu. The little speaker (volume control has 
a little red x and upon clicking it a dialog stating: "No volume control 
GStreamer plugins and/or devices found." appears.

Any ideas?

Best Regards
/Johan