auvia - sound on VIA EPIA CL6000E - VT1612A chip - not working

[Andreas Bartelt <OpenBSD@bartula.de>]

Hello. I don't get sound working on my VIA EPIA CL6000 board. The 
OpenBSD HCL says that the 8833 southbridge ist supported. The VIA EPIA 
CL-series has a 8835 southbride with a VT1612A sound chip. When trying 
to play mp3 files with mpg123 I don't get an error - but I hear no 
sound. I'm not sure if my line out connector is broken or simply the 
chip is not compatible.

I'm running the OpenBSD_3_4-stable branch.

Has somebody else tried this?

"audioctl -a" says:
name=VIA VT8233
version=
config=auvia
encodings=ulinear:8,mulaw:8*,alaw:8*,slinear:8*,slinear_le:16,ulinear_le:16*,slinear_be:16*,ulinear_be:16*
properties=full_duplex,mmap,independent
full_duplex=0
fullduplex=0
blocksize=9600
hiwat=6
lowat=1
monitor_gain=0
mode=
play.rate=48000
play.channels=2
play.precision=16
play.encoding=slinear_le
play.gain=127
play.balance=32
play.port=0x0
play.avail_ports=0x0
play.seek=9600
play.samples=989080
play.eof=0
play.pause=0
play.error=1
play.waiting=0
play.open=0
play.active=0
play.buffer_size=65536
record.rate=8000
record.channels=1
record.precision=8
record.encoding=mulaw
record.gain=191
record.balance=32
record.port=0x1
record.avail_ports=0x7
record.seek=0
record.samples=0
record.eof=0
record.pause=0
record.error=0
record.waiting=0
record.open=0
record.active=0
record.buffer_size=65536
record.errors=0

And the corresponding "dmesg" part says:
...
auvia0 at pci0 dev 17 function 5 "VIA VT8233 AC97 Audio" rev 0x50: irq 9
ac97: codec id 0x56494161 (VIA Technologies VT1612A)
ac97: codec features headphone, 18 bit DAC, 18 bit ADC, KS Waves 3D
audio0 at auvia0
...