No sound over HDMI

I am unable to get any sound coming out from where I want it to, which is the HDMI port on my graphics card. I’ve gone through everything I could on the wiki, but nothing works.

Basic info about the machine with this issue follows:

Version: OpenSUSE 13.1 (x86_64)
Kernel: 3.11.10-7-desktop
Desktop: KDE output: