Intel HDA is a specification, the successor to AC’97. Still requires codec.
With Intel HD Audio built into kernel, with all codecs, you see the following in dmesg after boot:
Advanced Linux Sound Architecture Driver Version 1.0.16.
...
ALSA device list:
#0: HDA Intel at 0xc8000000 irq 16
...
To see required codecs…
slap steph # ls /proc/asound/card0/codec#*
/proc/asound/card0/codec#0 /proc/asound/card0/codec#1
slap steph # head -n1 /proc/asound/card0/codec#0
Codec: Realtek ALC880
slap steph # head -n1 /proc/asound/card0/codec#1
Codec: LSI Si3054
Searching around the internet, it seems that LSI is a modem. So, when make menuconfig according to Gentoo alsa guide, enable…
Intel HD Audio with Realtek HD-audio codec.
Even if have sound support compiled in kernel, still need alsa-utils as it provides init scripts (and /etc/modules.d/alsa even though not used).
