see the part on the top of the sound settings window where it says "Audio Card"? I go to that, select bcm2835 Headphones, and push close. The audio still does not work. I go to the audio settings again, to find the window looking like it does in the screenshot. No Audio Card stays selected, and no sound comes from the headphones when I try to use sonic-pi, or try to watch a youtube video, or run sauerbraten, or lmms. No sound at all. I found that port audio is not installed. Will installing it fix the problem? If so, how do I install it? I looked around on the web, and found nothing at all on how to install it. How can I fix this problem of no audio?