sound at starting but no sound thereafter

Hi. I just installed opensuse 11.2 64 bits KDE 4.
Everything went well except for sound. The starting and end sound of opensuse (default sound) can be heard throught he speakers. However if I try to play music or flash player, I will get no sound. Kmixer did not show any channel muted. And the card is recognized (XonarD2).
Any ideas to overcome this? It worked well in ubuntu, so there should be a solution to get it working in opensuse. Help, please!

Please read our new users multimedia faq:
Multi-media and Restricted Format Installation Guide - openSUSE Forums

… in fact, please read all the stickies in our new users faq/how-to area:
New User How To/FAQ (read only) - openSUSE Forums

thanks for the reply. This is not a problem of codecs. I already added all the community based repositories and have flash working. The problem is sound! For some reason, after login in and playing the staring default sound of opensuse, the sound does not work anymore… maybe it fall to a default configuration where the wrong channels are open. I do not know how to find the cause. My desktop have 2 sounds cards. The motherboard card and the xonar d2, that is shown in Kmix.

2 sound devices. … hmmm…

Take a look here at step-9: SDB:AudioTroubleshooting - openSUSE - determine the order of sound devices

sorry buddy. I appreciate that you take your time to help others. I hope you can help me.
The system works out of box with ubuntu. So they system has been tested and proved to work. I look forward to your advice.

As noted here:

Please ensure you have the order set up correctly for your sound devices.

well, the xonar card is listed as number 0. So it should be the preferred card. What I find weird is that it can play the starting sound of KDE 4 but no other sounds.For references, the only card listed by phonon and Kmix is the xonar. Any ideas?

Not so weird. If you look at under your desktop settings for KDE you will see it assigns priority to cards as well.

Also note in your media players (such as vlc, xine-ui, smplayer) you can select the audio output mode.

Can you run:
/usr/sbin/alsa-info.sh
and select SHARE/UPLOAD and then provide here the URL that it provides.

card 1: D2 [Xonar D2], device 1: Digital [Digital] │─
│ Subdevices: 1/1 │
│ Subdevice #0: subdevice #0
│ │
│ !!Amixer output │
│ !!------------- │
│ │
│ !!-------Mixer controls for card 1 [D2] │
│ │
│ Card hw:1 ‘D2’/‘Asus Virtuoso 200 (rev 2) at 0xcc00, irq 21’ │
│ Mixer name : ‘AV200’ │
│ Components : ‘PCM1796 CS5381 AV200’ │
│ Controls : 23 │
│ Simple ctrls : 12 │
│ Simple mixer control ‘Master’,0 │
│ Capabilities: pvolume pswitch pswitch-joined │
│ Playback channels: Front Left - Front Right - Rear Left - Rear Right - F │
│ Limits: Playback 135 - 255 │
│ Mono: │
│ Front Left: Playback 255 [100%] [0.00dB] [on] │
│ Front Right: Playback 255 [100%] [0.00dB] [on] │
│ Rear Left: Playback 255 [100%] [0.00dB] [on] │
│ Rear Right: Playback 255 [100%] [0.00dB] [on] │
│ Front Center: Playback 255 [100%] [0.00dB] [on] │
│ Woofer: Playback 255 [100%] [0.00dB] [on] │
│ Side Left: Playback 255 [100%] [0.00dB] [on] │
│ Side Right: Playback 255 [100%] [0.00dB] [on] │
│ Simple mixer control ‘Line’,0 │
│ Capabilities: cswitch cswitch-joined │
│ Capture channels: Mono │
├────v(+)────────────────────────────────────────────────────────────34%─────┤
│ < EXIT > │
└────────────────────────────────────────────────────────────────────────────┘
Your ALSA information is located at http://www.alsa-project.org/db/?f=9248e7efda2daea12fef4b3ca45d2032b4748b2b

Please inform the person helping you.

Does adjusting this to Front or Front Surround Back make any difference ?

Simple mixer control 'Stereo Upmixing',0
  Capabilities: enum
  Items: 'Front' 'Front Surround' 'Front Surround Back'
  Item0: 'Front Surround'

What are you using for a speaker test?