When I got the sound of silence,
mplayer and firefox were using a "sound card"
to which I had not attached speakers.
Are your speakers attached where they should be?
If so, is there some other audio device,
broadly defined, to which audio data might be sent?
Here is advice I got from Tom Horsley:
Hi,
I cannot use my sound card with F13.
This is a part of lsmod :
snd_hda_codec_realtek 297127 1
snd_hda_intel 23960 2
snd_hda_codec 85624 2 snd_hda_codec_realtek,snd_hda_intel
snd_ctxfi 86816 2
snd_hwdep 6454 1 snd_hda_codec
snd_seq
