Sound Card Volume isn't adjustable (Sis 7012/snd_ich)

[Jason Sheets]

Hello everyone,

I'm having trouble controlling the sound level of my sound card,
specifically volume adjustments using mixer and other volume control
tools don't change the actual volume. 

For example when playing a MP3 at 1% volume the sound is unbearably loud
and moving the volume to 100% doesn't affect the volume, at 0% there is
no sound.

I have tried using mixer with no -f argument and also tried adjusting
the volume for each dsp entry in /dev with no effect.

Configuration:

OS: 5.3-RC1 FreeBSD 5.3-RC1 #2: Fri Oct 29 10:30:21 MDT 2004
Sound Card: ASuS P48SX onboard audio

Driver: snd_ich, sound card detected as SiS 7012, driver loaded via
kldload

dmesg:

pcm0: <SiS 7012> port 0x9000-0x907f,0x9400-0x94ff irq 18 at device 2.7
on pci0
pcm0: [GIANT-LOCKED]
pcm0: <C-Media Electronics CMI9739 AC97 Codec>

kldstat

 1   12 0xc0400000 4ffbe4   kernel
 2   14 0xc0900000 537f0    acpi.ko
 3    1 0xc1c67000 5000     linprocfs.ko
 4    1 0xc1c70000 17000    linux.ko
 5    1 0xc1e36000 5000     snd_ich.ko
 6    1 0xc1e3b000 18000    sound.ko

cat /dev/sndstat

FreeBSD Audio Driver (newpcm)
Installed devices:
pcm0: <SiS 7012> at io 0x9400, 0x9000 irq 18 bufsz 16384 kld snd_ich
(1p/1r/2v channels duplex default)
        [pcm0:play:0]: spd 44100/48000, fmt 0x10000010, flags
0x00003020, 0x00000010
        interrupts 45586, underruns 7126, ready 0
        {userland} -> feeder_vchan_s16(0x10000010) -> feeder_rate(44100
-> 48000) -> {hardware}
        [pcm0:record:0]: spd 48000, fmt 0x00000008/0x10000010, flags
0x00000000, 0x00000000
        interrupts 0, overruns 0, hfree 16384, sfree 131072
        {hardware} -> feeder_root(0x10000010) ->
feeder_sign16le(0x10000010 -> 0x10000080) ->
feeder_stereotomono16(0x10000080 -> 0x00000080) ->
feeder_16leto8(0x00000080 -> 0x00000008) -> {userland}
        pcm0:play:0[pcm0:virtual:0]: spd 32000/48000, fmt
0x00000010/0x10000010, flags 0x10003030, 0x00000010, pid 34433
        interrupts 0, underruns 0, ready 65536
        {userland} -> feeder_root(0x00000010) ->
feeder_monotostereo16(0x00000010 -> 0x10000010) -> feeder_rate(32000 ->
48000) -> {hardware}
        pcm0:play:0[pcm0:virtual:1]: spd 8000/48000, fmt
0x00000008/0x10000010, flags 0x10000000, 0x00000010
        interrupts 0, underruns 0, ready 0
        {userland} -> feeder_root(0x00000008) -> feeder_sign8(0x00000008
-> 0x00000040) -> feeder_monotostereo8(0x00000040 -> 0x10000040) ->
feeder_8to16le(0x10000040-> 0x10000010) -> feeder_rate(8000 -> 48000) ->
{hardware}

File Versions:
$FreeBSD: src/sys/dev/sound/pci/ich.c,v 1.42.2.2 2004/10/07 18:38:55 ps
Exp $
$FreeBSD: src/sys/dev/sound/isa/sndbuf_dma.c,v 1.2 2003/09/07 16:28:02
cg Exp $
$FreeBSD: src/sys/dev/sound/pcm/vchan.c,v 1.16 2004/01/28 08:02:15
truckman Exp $
$FreeBSD: src/sys/dev/sound/pcm/ac97_patch.c,v 1.2 2003/08/21 15:44:55
orion Exp $
$FreeBSD: src/sys/dev/sound/pcm/feeder.c,v 1.32 2003/09/07 16:28:03 cg
Exp $
$FreeBSD: src/sys/dev/sound/pcm/sound.c,v 1.92 2004/07/16 03:59:09
tanimura Exp $
$FreeBSD: src/sys/dev/sound/pcm/fake.c,v 1.13 2003/09/07 16:28:03 cg Exp
$
$FreeBSD: src/sys/dev/sound/pcm/sndstat.c,v 1.17.2.1 2004/09/14 06:43:46
truckman Exp $
$FreeBSD: src/sys/dev/sound/pcm/dsp.c,v 1.77 2004/07/02 15:31:44
netchild Exp $
$FreeBSD: src/sys/dev/sound/pcm/mixer.c,v 1.40 2004/06/25 16:34:33 josef
Exp $
$FreeBSD: src/sys/dev/sound/pcm/ac97.c,v 1.51 2004/05/08 03:41:40 sanpei
Exp $
$FreeBSD: src/sys/dev/sound/pcm/feeder_rate.c,v 1.10 2003/04/20 17:08:56
orion Exp $
$FreeBSD: src/sys/dev/sound/pcm/channel.c,v 1.97 2004/02/28 19:47:02
truckman Exp $
$FreeBSD: src/sys/dev/sound/pcm/feeder_fmt.c,v 1.13 2003/09/07 16:28:03
cg Exp $
$FreeBSD: src/sys/dev/sound/pcm/buffer.c,v 1.23 2004/04/29 02:51:59
green Exp $