Fedora Users — Re: Audio problem

Nigel Henry wrote:

On Wednesday 11 February 2009 22:08, JD wrote:

Dear list,
I am running FC7, kernel 2.6.23.17-88.
It has been fine for more than 2 years.
Yesterday, the audio stopped working.
I thought it was the HW.
I booted into WinXP and tested the audio,
Audio was fine.

How do I debug this problem to find out the cause?


Well Fedora core 7 is old, but I'm posting from Fedora core 2, so as far as 
I'm concerned, if it is still working, and your happy with it, keep using it.

Back to your sounds. Can you post the output from the following commands, 
which will show if the soundcard is being detected, and if the necessary 
modules are being loaded,

cat /proc/asound/cards
/sbin/lsmod | grep snd

It's worth also opening alsamixer in Gnomes terminal, or KDE's Konsole, if 
you're using KDE like me, and see if all the necessary sliders are still up 
(Master, Front, PCM, CD), and that none of these controls are muted (The M 
key toggles the mute/unmute).

Have you plugged a new audio related device into the USB (webcam, usb midi 
keyboard, etc). The usb starts early in the boot process, and alsa can detect 
these devices as soundcards, and set them as card0, thus stopping your actual 
soundcard using the card0 slot, resulting in no sounds.

Just a few thoughts for a start.

Nigel.

OK, here is the output, but it looks same as I have always seen it: # cat /proc/asound/cards 0 [SI7012 ]: ICH - SiS SI7012 SiS SI7012 with ALC655 at irq 18 1 [Modem ]: ICH-MODEM - SiS SI7013 Modem SiS SI7013 Modem at irq 18 # /sbin/lsmod | grep snd snd_intel8x0m 23377 0 snd_seq_dummy 11461 0 snd_intel8x0 39657 4 snd_ac97_codec 116633 2 snd_intel8x0m,snd_intel8x0 ac97_bus 10817 1 snd_ac97_codec snd_seq_oss 37185 0 snd_seq_midi_event 14913 1 snd_seq_oss snd_seq 56673 5 snd_seq_dummy,snd_seq_oss,snd_seq_midi_event snd_seq_device 15061 3 snd_seq_dummy,snd_seq_oss,snd_seq snd_pcm_oss 47553 0 snd_mixer_oss 22721 1 snd_pcm_oss snd_pcm 80585 5 snd_intel8x0m,snd_intel8x0,snd_ac97_codec,snd_pcm_oss snd_timer 27721 3 snd_seq,snd_pcm snd 59753 16 snd_intel8x0m,snd_intel8x0,snd_ac97_codec,snd_seq_oss,snd_seq,snd_seq_device,snd_pcm_oss,snd_mixer_oss,snd_pcm,snd_timer soundcore 14945 1 snd snd_page_alloc 16337 3 snd_intel8x0m,snd_intel8x0,snd_pcm The only NEW item I have plugged in over 2 weeks ago has been a BLUETOOTH stick for my bluetooth mouse. But that did not disable the sound. The sound went away about 2 days ago. So, That leaves me puzzling over why I lost the audio.

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