No audio from (working?) via82cxxx

[Zach Wilkinson]

On board sound card is a ADI AD1980 SoundMAX 6-channel CODEC S/PDIF out
interface.  Is detected as follows:

[Output from dmesg:]
Via 686a/8233/8235 audio driver 1.9.1-ac3
PCI: Found IRQ 9 for device 00:11.5
PCI: Sharing IRQ 9 with 00:10.4
via82cxxx: Six channel audio available
PCI: Setting latency timer of device 00:11.5 to 64
via82cxxx: timeout while reading AC97 codec (0xAA0000)
ac97_codec: AC97 Audio codec, id: ADS112 (Unknown)
via82cxxx: board #1 at 0xE000, IRQ 9

[Output from lsmod:]
via82cxxx_audio        24056   1 (autoclean)
ac97_codec             17064   0 (autoclean) [via82cxxx_audio]
uart401                 8356   0 (autoclean) [via82cxxx_audio]
sound                  73300   0 (autoclean) [via82cxxx_audio uart401]
soundcore               6500   4 (autoclean) [via82cxxx_audio sound]

[Output from cat /proc/pci:]
Bus  0, device  17, function  5:
    Multimedia audio controller: VIA Technologies, Inc. VT8233/A/8235
AC97 Audio Controller (rev 96).
      IRQ 9.
      I/O at 0xe000 [0xe0ff].

Sound Card detection tool identifies it as above, but the test sound
cannot be heard.  From command line, # play <some_wav>.wav also produces
no sound, as well as no errors.
System thinks everything is fine but I hear nothing, even when volume is
turned up.
Works fine when booted into WinXP.

Zach