Hello,

I've been trying to get my Realtek HD audio to work, but have had only partial success. Alsa seems to load fine, as does the sound card driver (snd-hda-intel). I have alsa-utils, alsa-lib, alsa-oss and alsa-driver installed. Plus I get a very tidy-looking boot with no error messages coming from alsa whatsoever.
Alsamixer also seems to work fine. However, there's no "master" volume, only PCM, Front (which is always 0), CD and Mic in the playback view. PCM is unmuted.
Alsaconf also recognized my sound card with no problem.
When I try to play something (music or video) I get absolutely no sound. No error messages either, but no sound at all.
Oh, and alsa support and device drivers are loaded as modules in the kernel (2.6.18).
Using alsa from the slackware repository, version 1.0.11.

Any ideas would be greatly appreciated. I've been trying to figure this one out for a while now and no searches have seemed to help me.

Thanks.

I have the same with my laptop. Sound get muted.., but only in KDE. You have probably the same problem. Just test it by not starting KDE, run alsamixer to adjust the right settings (unmute and turn on volume) and run xfce. Then put in the audio cd, and it will probably play.

I haven't found how to fix this for kde :/

In KMix, go Settings > Configure KMix... and then uncheck "Restore volumes on login". That did it for me.

Ahh... I was actually using Xfce in the first place and sort of took its mixer for granted. It was actually a problem with its mixer and not alsa or kde... Thanks for pointing out the kde mixer as that made me suspicious of xfce.
The other problem now I have to take care of is the volume of sound. It seems very very quiet with PCM on 100.