Hey,
I am using Gentoo Linux (64 bit) on my Dell Studio XPS laptop. (2.6.32-gentoo-r7).

# lspci | grep Audio
00:1b.0 Audio device: Intel Corporation 82801I (ICH9 Family) HD Audio Controller (rev 03)
01:00.1 Audio device: ATI Technologies Inc RV635 Audio device [Radeon HD 3600 Series]

alsaconf shows the two cards, and I configured using the first card. But no sound from the internal laptop speakers, headphones work fine though. Nothing is muted in alsamixer. . The two headphone bars work for the two headphone jacks respectively. ( There is a PCM and a speaker bar too).

While booting, I get an error,

Unknown hardware: "HDA-Intel" "IDT 92HD73C1X5" "HDA:111d7675,10280272,00100103" "0x1028" "0x0272"
Hardware is initialized using a guess method

#aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: HDMI [HDA ATI HDMI], device 3: ATI HDMI [ATI HDMI]
Subdevices: 1/1
Subdevice #0: subdevice #0


# lsmod | grep snd
snd_seq_midi_event 5039 0
snd_seq 50156 1 snd_seq_midi_event
snd_seq_device 5109 1 snd_seq
snd_hda_codec_atihdmi 2395 1
snd_hda_codec_idt 50383 1
snd_hda_intel 19465 2
snd_hda_codec 67585 3 snd_hda_codec_atihdmi,snd_hda_codec_idt,snd_hda_in tel
snd_hwdep 5374 1 snd_hda_codec
snd_pcm 67241 2 snd_hda_intel,snd_hda_codec
snd_timer 17542 2 snd_seq,snd_pcm
snd 49441 12 snd_seq,snd_seq_device,snd_hda_codec_idt,snd_hda_i ntel,snd_hda_codec,snd_hwdep,snd_pcm,snd_timer
soundcore 936 1 snd
snd_page_alloc 6997 2 snd_hda_intel,snd_pcm


I also tried updating alsa to 1.0.23 (although its not available in the portage)

Please help.