I had compiled the wrong kernel driver before. For my onboard Realtek ACL889A card, I need the
snd-intel-hd driver. With that fixed, I was able to run alsaconfig, which detected and set up my card. I then started up KDE, and opened the systemsettings tool (which I have to say is really nice, BTW...much better than KControlCenter!).In the Multimedia section, I saw three options:
HDA ATI SB (ALC883 Analog)HDA ATI HDMI (HDMI Audio output)Jack Audio connection kit
I knew I wanted to use HDMI audio output, so I tried that one first; there's a "Test" button in the tool, and on pressing it...woohoo! I heard the dulcet chimes of the KDE startup tune. Woo. I set the HDMI option to be the default output for all sound categories, and pressed Apply. There is also a "Backend" tab in this tool. In my case, this tab has two options: Xine and GStreamer. Xine was selected by default. I also tried GStreamer, but it didn't work immediately, so I went right back to Xine (IIAB,DFI).
Well, it can't all be good news, right? I tried watching a recording in MythTV, and there's still no sound output. I also tried using mplayer directly, and that also lacks audio. Dragon Player does have audio (not too surprising, since it uses Xine as a backend). I found this really nice guide, which gave me lots of good ideas and brought me closer to success, but not there yet. What I mean is, sound still doesn't function in mplayer and mythtv, but at least now here are no error messages :/
I started a thread on the Gentoo forums; hopefully someone will have ideas.
Update: It works now. I don't know what I did to fix it, but both mplayer and MythTV now produce audio!
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