No sound in 13.1 Intel on board sound card

I was just given a computer from a coworker and installed the latest Slackware version on it. I then installed Gnome Slackbuild and installed the Nvidia driver. For some reason sound is not working and was wondering if anyone could help. I've read a bunch of other posts about sound not working but they were all over the place and none of the solutions have worked for me. I've run alsaconf and it seems to run fine without any errors and unmuted all the channels in alsamixer.

lspci

00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High Definition Audio Controller (rev 01)


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 0: Intel [HDA Intel], device 1: STAC92xx Digital [STAC92xx Digital]
  Subdevices: 1/1
  Subdevice #0: subdevice #0


lsmod

Module                  Size  Used by
nvidia              10055229  28 
snd_seq_dummy           1107  0 
snd_seq_oss            25580  0 
snd_seq_midi_event      4620  1 snd_seq_oss
snd_seq                42857  5 snd_seq_dummy,snd_seq_oss,snd_seq_midi_event
snd_seq_device          4543  3 snd_seq_dummy,snd_seq_oss,snd_seq
snd_pcm_oss            33917  0 
snd_mixer_oss          13399  2 snd_pcm_oss
appletalk              23278  20 
psnap                   1564  1 appletalk
llc                     3005  1 psnap
ipv6                  229909  27 
pcmcia                 27872  0 
pcmcia_core            25659  1 pcmcia
ses                     5608  0 
enclosure               4959  1 ses
lp                      7161  0 
fuse                   52401  5 
snd_hda_codec_idt      44406  1 
snd_hda_intel          18936  1 
processor              26515  0 
ppdev                   5103  0 
thermal                10194  0 
joydev                  7989  0 
snd_hda_codec          57091  2 snd_hda_codec_idt,snd_hda_intel
parport_pc             18027  1 
snd_hwdep               5046  1 snd_hda_codec
led_class               2037  0 
snd_pcm                57736  3 snd_pcm_oss,snd_hda_intel,snd_hda_codec
parport                25487  3 lp,ppdev,parport_pc
rtc_cmos                7838  0 
thermal_sys            12086  2 processor,thermal
intel_agp              22699  0 
hwmon                   1085  1 thermal_sys
sg                     21214  0 
snd_timer              15699  2 snd_seq,snd_pcm
i2c_i801                7194  0 
i2c_core               15279  2 nvidia,i2c_i801
rtc_core               12050  1 rtc_cmos
rtc_lib                 1522  1 rtc_core
psmouse                40750  0 
button                  3934  0 
serio_raw               3754  0 
tg3                   112417  0 
snd                    43107  11 snd_seq_oss,snd_seq,snd_seq_device,snd_pcm_oss,snd_mixer_oss,snd_hda_codec_idt,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_timer
soundcore               4815  2 snd
libphy                 14073  1 tg3
agpgart                23773  2 nvidia,intel_agp
snd_page_alloc          5849  2 snd_hda_intel,snd_pcm
evdev                   6939  11 
usbhid                 33016  0 
hid                    61027  1 usbhid


cat /proc/asound/card0/codec#* | grep Codec:
Codec: SigmaTel STAC9221 A1

Any will be appreciated
Thanks

Check the volume widget in the system tray. I had the same problem once and that was muted. Then again, I run KDE. If you are running Gnome, it could still be the same problem.

Make sure you have volti added to your panel in Gnome. That's the name of the volume applet in gsb 2.30.

Just another thing to check in alsamixer... F4 use space bar to select capture... arrow keys to move right and left.

And yet another thing to check... I have similar hardware (Intel HDA, STAC92xx) and sound only works through the rear audio out jack, nothing through the front jack. This has been true since Slackware 13.0 or so and is something to do with "smart" jack detection that was added to the driver. It seemsto have decided that the front jack is something other than Line Out. I never figured out if it could be fixed, and just use the back jack. So if you have multiple out jacks, try them all.

Sometimes I check and make sure I am running the latest drivers from the alsa-project, which at the time of this posting, is alsa-driver-1.0.23

After compiling and installing latest alsa, have had sound work in some situations.

mlangdan & damgar - I have checked the volume control and nothing is muted.

hughetorrance - I did F4 in alsamixer as you suggested and turned anything off to on and increased the level but it didn't do anything. What exactly are the capture's?

ljb643 - Thanks you so much you're a genius, it works now. I was already using the back jacks, but sound is only coming out of the blue jack when it usually comes out of the green. Weird.


Thanks a lot everyone for helping with your suggestions!