Hi,
Did you ever get the sound working on your system?
The output of your "lspci -v" looks exactly like mine, so I assume we have essentially the same computer (HP Media Center) and the same problem with the sound.
According to the HP website the soundcard is based on the Realtek ALC 880 chipset and the Realtek site has a driver for linux. But it is source code and I can't get it to compile.
Has anyone succeeded in getting the audio to work on an HP Media Center (especially the m1095c)??