Hi, I have HDa nVidia onboard too, asus m2n-x.(MCP65 High Definition Audio, Module: snd_hda_intel)
I have not used PulseAudio for the same reasons, almost.
I still use alsa and have disabled Pulse.
I'm not too sure why, but alsa still works with everything, games, movies, desktop-sounds.
It maybe that your game needs to be set to alsa, I thought pulse was like jack (qjackctl) that picked up all other sound processes and fed them through pulse to the hardware.
I'll keep an eye on this post to see what else I may learn from this question.(I could be wrong(in-accurate))
Last edited by GlennsPref; 06-06-2008 at 05:26 PM.