cannot get sound on Toshiba laptop

[Tom Schutter <t.schutter@att.net>]

I have a Toshiba laptop that I cannot get the sound working on.
No error messages, but nothing comes out of the speaker.

Here are the particulars:
  Toshiba Satellite, model 2805-S301
  Yamaha YMF754B-R sound card
  Debian 3.0r0 woody
  2.4.18-bf2.4 kernel

# lsmod
Module                  Size  Used by    Not tainted
ymfpci                 40800   1
ac97_codec              9568   0  [ymfpci]
soundcore               3236   2  [ymfpci]
eepro100               17264   1
nls_iso8859-1           2880   0  (autoclean)
nls_cp437               4384   0  (autoclean)
ds                      6624   2
i82365                 22416   2
pcmcia_core            41408   0  [ds i82365]
apm                     9148   2  (autoclean)
keybdev                 1664   0  (unused)
usbkbd                  2848   0  (unused)
input                   3072   0  [keybdev usbkbd]
usb-uhci               20708   0  (unused)
usbcore                48032   0  [usbkbd usb-uhci]

# ls -l /dev/dsp
crw-rw----    1 root     audio     14,   3 Mar 14 14:51 /dev/dsp

I am in the audio group.
Settings/Multimedia/Sound, Sound Events tab, Play button gives
no sound.

ALSA is not installed, but I am not sure exactly which packages
to install.  Do I need alsa-modules-2.4.x?  All I see are
alsa-modules-2.4.16-*, nothing for 2.4.18.

Does anyone have any suggestions?

--
Tom Schutter
t.schutter@att.net