Please try working your way through the following openSUSE audio troubleshooting guide:
http://en.opensuse.org/AudioTroubleshooting

If you get stumped anywhere in the guide, please post:

a. output URLs of the two diagnostic scripts,
http://en.opensuse.org/AudioTroubleshootin...led_information

b. output of: <span style="font-family:Courier New">rpm -qa | grep alsa</span>

c. content of your /etc/modprobe.d/sound file