I am having some difficulty getting sound to work on my Ubuntu machine. I am trying to keep my installation as thin as possible (older machine), so I started off with Ubuntu Server 12.04 and installed only what I needed. Everything is going well, except for sound.

I ran sudo apt-get install alsa-base alsa-utils and that installed correctly. I can also run alsamixer (as root...not sure why I can't do that as a user) and it seems to see my Intel card. (HDA Intel, SigmaTel STAC9227). All channels appear to be unmuted within alsamixer.

Here is the output that I think is relevant.

lsmod | grep '^snd' | column -t



snd_intel9x0        38570   0

snd_ac97_codec      134826  1   snd_intel8x0

snd_hda_intel       33773   0

snd_seq_midi        13324   0

snd_rawmidi         30748   1   snd_seq_midi

snd_seq_midi_event  14899   1   snd_seq_midi

snd_seq             61896   2   snd_seq_midi,snd_seq_midi_event

snd_seq_device      14540   3   snd_seq_midi,snd_rawmidi,snd_seq

snd_hda_codec_hdmi  32474   1

snd_hda_codec_idt   70795   1

snd_hda_codec       127706  3   snd_hda_intel,snd_hda_codec_hdmi,snd_hda_codec_idt

snd_hwdep           13668   1   snd_hda_codec

snd_pcm             97188   5   snd_intel8x0,snd_ac97_codec,snd_hda_intel,snd_hda_codec_hdmi,snd_hda_codec

snd_timer           29990   2   snd_seq,snd_pcm

snd                 78855   12  snd_intel8x0,snd_ac97_codec,snd_hda_intel,snd_rawmidi,snd_seq,snd_seq_device,snd_hda_codec_hdmi,snd_hda_codec_idt,snd_hda_codec,snd_hwdep,snd_pcm,snd_timer

snd_page_alloc      18529   3   snd_intel8x0,snd_hda_intel,snd_pcm

and:

ls -l /dev/snd/



total 0

drwxr-xr-x 2 root root       80 May  1 19:35 by-path

crw-rw---T 1 root audio 116,  5 May  1 19:35 controlC0

crw-rw---T 1 root audio 116,  8 May  1 19:35 controlC1

crw-rw---T 1 root audio 116,  4 May  1 19:35 hwC0D2

crw-rw---T 1 root audio 116,  7 May  1 19:35 hwC1D0

crw-rw---T 1 root audio 116,  3 May  1 19:35 pcmC0D0c

crw-rw---T 1 root audio 116,  2 May  1 19:35 pcmC0D0p

crw-rw---T 1 root audio 116,  6 May  1 19:35 pcmC1D3p

crw-rw---T 1 root audio 116,  1 May  1 19:35 seq

crw-rw---T 1 root audio 116, 33 May  1 19:07 timer

update based on comment

lspci | grep Audio



00:1b.0 Audio device: Intel Corporation 82801H (ICH8 Family) HD Audio Controller (rev 02)

01:00.1 Audio device: Advanced Micro Devices [AMD] nee ATI RV770 HDMI Audio [Radeon HD 4850/4870]