Sound Problem after install
 

Hello All

a strange problem, when i ran the install of FC3 onto my laptop, it played the sound that it should to test the sound card asking if i was happy, the answer was a resounding YES as I heard the sound through the left, then right then both speakers as normal. BUT after the install has finished and I am using the sytem normally, I now get no sound at all, the soundcard autodetector tells me I have an SIS Sound Controller using driver snd-intel8X0 but will not play any sound from it and tells me sound is not available as I did not hear anything. I have checked alsamixer and nothing is muted. I am utterly confused as to why it found it and made it work during install but not now. anyone had or heard of this problem before and can throw some light (or maybe sound) onto the problem?
many thanks

I have just been to the website or my laptop manufacturer and the soundcard installed is a SoundMAX AC'97 Audio Controller

alsamixer tells me

card = SiS SI7012
chip = Analogue Devices AD1981B

and lsmod shows

snd_intel8x0m 19333 2
snd_intel8x0 34177 2
snd_ac97_codec 75065 2 snd_intel8x0m,snd_intel8x0
snd_pcm_oss 50673 0
snd_mixer_oss 17729 3 snd_pcm_oss
snd_pcm 99017 4 snd_intel8x0m,snd_intel8x0,snd_ac97_codec,snd_pcm_oss
snd_timer 32837 1 snd_pcm
snd 57157 11 snd_intel8x0m,snd_intel8x0,snd_ac97_codec,snd_pcm_oss,snd_mixer_oss,snd_pcm,snd_timer
soundcore 10785 3 snd
snd_page_alloc 9669 3 snd_intel8x0m,snd_intel8x0,snd_pcm

Volume is mute by default, use alsa-mixer to unmute it

You wouldn't happen to be running an HP nx9600 laptop would you? :-) This sounds very familliar. With a few variations, I had the same problem under FC4. I added 'snd-intel8x0m' to the end of /etc/hotplug/blacklist to remove confusion between the modem and the sound. That made it work. It might be a differn't file for FC3 though.

Thanks I shall have a look and let you know how it goes, I know it is not the mute as I have checked all the settings in alsa-mixer and nothing is muted, unless it is back to front and i have to mute it to make it work. we shall see

Did you take a look at /var/log/messages and make sure there's nothing unusual ?

Unload all the sound modules and modprobe them manually with -v switch and see if that tells you something.

ok here we go, this is what I have found out:

I added 'snd-intel8x0m' to the end of /etc/hotplug/blacklist to no avail, made no difference at all.

I had a look at /var/log/messages and there were no unusual messages there to point at a problem

I unloaded the sound module and then did the following with the following consequences

[root@loacalhost ~]# modprobe -v snd-intel8x0
install /sbin/modprobe --ignore-install snd-intel8x0 && /usr/sbin/alsactl restore >/dev/null 2>&1 || :
insmod /lib/modules/2.6.12-1.1381_FC3.stk16/kernel/sound/pci/snd-intel8x0.ko

does this point anyone at the cause of my grief?

also can I in linux tell the system to just ignore the AC'97 modem, as I do not use it at all now I have broadband???

many thanks
Paul

just found something interesting

I decided to boot up the old kernel and the sound works perfectly, booting it back into the new kernel ( updated using yum) the sound no longer works, do you think booting the old kernel again and going through an upgrade again might solve the problem??