I am having the same problem on my Latitude D830 with SigmaTel STAC9205 sound card. I've tried adjusting the playback devices and still no sound. Internal mic does work for recording though.

alsa snapshot fixes no-sound problem on FC10 kernel 2.6.27.9-159
 

http://linux.derkeiler.com/Mailing-L.../msg00122.html

Check the links down towards the bottom (dl.atrpms.net).

This fixes the kernel-alsa breakage for people with Intel-HDA audio.

(This is a cheap way of saying that *I* now have sound on my D830.)

For ubuntu, chances are that there's an ubuntu mailing list with a similar fix for whatever kernel incorporated the alsa breakage.

Unlikely to help people with other audio chips, but no reason not to give it a whirl.

BTW, I say that "I now have sound" on the basis of sound from the gnome-sound-properties panel and from mplayer.

For whatever reason, kscd plays audio CDs silently, and the latest amarok (another kde app) completely defeated me when I tried to figure how to play a CD with it .. so if you're having trouble with kde, you might try the gnome tools to see whether you have multiple points of failure.

There are several other posts that may be worth looking at if this doesn't solve your problem:

1) http://linux.derkeiler.com/Mailing-L.../msg00129.html

2) http://ubuntuforums.org/showthread.php?t=789578 (particularly for ubuntu)

3) http://www.uluga.ubuntuforums.org/sh...d.php?t=772632
I'm not sure how much of this post I take seriously, but the pa.* tools are worth knowing about.

4) http://fedoraforum.org/forum/showpos...9&postcount=66

RusFuture has way too much time on his hands. :-)

Well, OK, his is an awesome post. Anyone who reads the pulseaudio wiki and edits policykit configuration to solve a sound problem is a better man than I am.

The Ubuntu links are associated with breakage in pulseaudio in spring '08 that has long been fixed, but there may nonetheless be something useful there. (I didn't know about the pa.* tools..)

Cheers, Bozo The Clown

All the previous posts have been really helpful! I also got audio to work after the following steps:
1. Run alsa-info to debug
2. Fix perms issue with chmod
3. Fiddling with the PCM level on the main mixer.

I tested out the audio on VLC with the following media formats successfully but got choppy output: wma, mp3, avi.

PCM volume levels seem to be really low. I get unexpected results as well when i run alsaunmute:
Unknown hardware: "HDA-Intel" "Analog Devices AD1983" "HDA:11d41983,102801da,00100400" "" ""
Hardware is initialized using a guess method

Same problem
 

I am having the same trouble as the other members, I removed an older Fedora and did a brand new install of FC 10, and have had absolutely no sound since then.

When I do alsaunmute I get :

Unknown hardware: "Audigy2" "SigmaTel STAC9721,23" "AC97a:83847609" "" ""
Hardware is initialized using a guess method

On iecset audio on :

control "IEC958 Playback Default" (index -1) not found

The results from running alsa-info will be in the next post.


Any help will be appreciated.

Thanks.

Alsa Link
 

Here are the results of running alsa-info :

http://www.alsa-project.org/db/?f=71...88c0003170c081

I am using gnome. In FC10, under System >> Preferences >> Hardware >> Volume control, I could select the IEC958 device and successfully run a test with beeping sound indicating the sound card with the atiixp digital output is detected and functioning. Then I tried rhythmbox to play mp3 music, after downloading all required codec and plugins, from rhythmbox I could play the music with perfect sound through the digital output (IEC958). However, xine, mplay, and realplayer 11 do not have any sound when playing mp3 music and movies and video clips. The video is fine, but just no sound coming from the digital output. I have not tested the jack because the system is hooked with a home theater amplifier. My thought is that it has to do with the configuration file under xine, mplayer, and realplayer, but how do I do it? I do see ~/.config/realplayrc for realplayer, but what should I change?

By the way this is an Asus P4R-800-V Deluxe embeded Sound device. And under FC4 and FC6, the digital output is working flawlessly.

My alsa-info is posted in the following site.
http://www.alsa-project.org/db/?f=55...b373cd7433fcf6

Maybe the audio system is blocked by some other application. I have often problems with Skype when running it on a system where Xine is installed and used. They seem to have a fight for audio access, sometimes rendering both incapable of producing any sound at all. Skype has an unconventional approach for using sounds, at least that's what I experienced when developing Skype API tools, so first of all try to find out no application is able to use sound or only Skype.

linux

After removing and reinstalling and removing pulseaudio and setting the ALSA in mplayer, I could get mplayer sound to work. The trick is that the same device has at least two output ports, and in the hardware, I have to choose hw0.1 instead of hw0. This really makes a difference. Now my mplayer is perfectly functioning. However, I have not been able to find the place to set xine, and real player. Moreover, when I checked youtube.com, I cannot get the flash to play right; flash player does not have sound at all. Does anyone have clue where I can access the configuration files in these applications? Thanks!

PCM volume default low
 

Run the following command:
alsamixer -c 0
and then make all the bars to 100%.
This worked for me.

I had exactly the same problem, but below solution worked perfectly for me. Moved the Surround to 100%

Thanks carolynhanger. I tried as you said but unfortunately, mine still does not work :( although all the bars go to 100%.

Another problem report in FC10
 

My sound worked for quite a while, but suddenly stopped when I rebooted. I don't remember doing any updates since it worked but I could be wrong.

What I now see that puzzles me is that the sound control is for "HDA ATI HDMI (Alsa mixer)", which implies it is trying to play sound through my graphics card (an ATI HD4670) instead of through the motherboard chipset, which I thought used hda_intel.

In lspci I see:
02:00.1 Audio device: ATI Technologies Inc RV730XT Audio device [Radeon HD 4670]

but I see nothing else audio-related, which is rather odd. My monitor is actually hooked up with dual-link DVI and has no speakers.

I do have snd_hda_intel loaded.

alsaunmute says this:
Unknown hardware: "HDA-Intel" "ATI ATI R6xx HDMI" "HDA:1002aa01" "0x1787" "0xaa38"
Hardware is initialized using a guess method

I have no /dev/dsp* devices.

iecset audio on failes with this message:
control "IEC958 Playback Default" (index -1) not found

I've installed Fedora 11 on Thinkpad R61, and I had sound only through the headphones.
The cause I've found was that the "speaker" control on the mixer was muted. So open the mixer, goto Settings->Configure Channels and tick Speaker so it appears on the controls, it had no slider, only a mute button, and untick it..

May you check your /boot/ and /boot/grub/menu.lst and see how many listings you have? If you have more than one instance, try to boot them individually and see which one gives you sound.

In FC4, only two kernels worked for me. In FC6, I have no sound problems, and now in FC10, my sound is working great, but flash player does not have any sound.

Just to re-open this odd issue: I'm running FC 11 on a Lenovo T61. Having run through all the posts in this thread I got sound working after I enabled the Option to "Enable window and button sounds". After that I can disable it again and sound works fine...very odd issue with this pulseaudio setup...