Please can you provide more information on your computer’s audio configuration in openSUSE-12.3 ? To do so, with your PC connected to the Internet, please in a terminal run the following diagnostic script :
/usr/sbin/alsa-info.sh
and select the UPLOAD/SHARE option. When the script is completely finished, please post here the web-site/URL address that the script advises you to pass to those trying to help.