Not sure if Suse requires you to run some type of service at boot to initiate alsa sound or not.
It is required. The shell-script /etc/init.d/alsasound is used for that.
This script requires /usr/sbin/alsactl program from alsa-utils package.
It runs '/usr/sbin/alsactl restore' at system startup
using the 'S<number>alsasound -> ../alsasound
K<number>alsasound -> ../alsasound links
in the /etc/init.d/rc<number>.d directories