I have a machine with only HDMI video/audio connection. The good news is that it works!
Kmix master volume control does not affect the sound. I clicked on Mixer but could find any other slider that controls the HDMI audio.
I clicked the "Add View" tab and selected "all controls". Now when I open the Mixer window it is wider than my screen, even though there aren't many controls in it (i.e. lots of empty gray area on both sides of the visible controls.) It won't resize either.
So first I would like to restore it to it default size, however, there isn't such option. Is there some configuration file I could edit (or delete) to fix that?
I also would like to configure kmix to show and use the HDMI control. I vaguely remember there should be some config file (alsa?) that would make this happen but can't remember what/where. How could I find out?