hey there fellows Ubuntians,

I need help with a sound problem that has been bugging me for a while.

When I launch a movie with VLC or a youtube video, I can hear the first few seconds (for example, if I'm watching an episode of "Mad Men", I can hear the HBO jingle clearly) *BUT* after a few seconds, the sound fades away. This is a real bummer if I want to use Skype, too.

It seems that the sound system is working, but something goes wrong partway.

Any suggestions about how to fix this issue? Thanks!

-The xUbuntu damsel in distress