Intel ICH6 with AD1986: Mic not working

[Joerg Platte <lists@naasa.net>]

Hi!

On my computer both microphones are not working but playback and all other 
audio stuff seems to work. I'm not sure if the microphones ever worked with 
alsa because I never tried it before. On windows they are working as 
expected, hence the hardware seems to be OK. Is there anything I can do to 
further debug this? Is it a known problem?

Below you can find more information about the hardware:

root@ds19:~> uname -a
Linux ds19 2.6.20-1-686 #1 SMP Tue Apr 24 21:52:11 UTC 2007 i686 GNU/Linux
(Debian kernel)
Doesn't work with 2.6.18 as well.

root@ds19:~> cat /proc/asound/card0/codec97#0/ac97#0-0
0-0/0: Analog Devices AD1986

PCI Subsys Vendor: 0x1734
PCI Subsys Device: 0x105a

Revision         : 0x02
Compat. Class    : 0x00
Subsys. Vendor ID: 0x0000
Subsys. ID       : 0x0000

Capabilities     : -headphone out-
DAC resolution   : 20-bit
ADC resolution   : 16-bit
3D enhancement   : No 3D Stereo Enhancement

Current setup
Mic gain         : +20dB [+20dB]
POP path         : pre 3D
Sim. stereo      : off
3D enhancement   : off
Loudness         : off
Mono output      : MIX
Mic select       : Mic1
ADC/DAC loopback : off
Double rate slots: 10/11
Extended ID      : codec=0 rev=2 AMAP LDAC SDAC CDAC DSA=0 SPDIF DRA VRA
Extended status  : SPCV LDAC SDAC CDAC SPDIF=10/11 VRA
PCM front DAC    : 48000Hz
PCM Surr DAC     : 48000Hz
PCM LFE DAC      : 48000Hz
PCM ADC          : 48000Hz
SPDIF Control    : Consumer PCM Copyright Category=0x22 Generation=1 
Rate=48kHz

                    Gain     Inverted  Buffer delay  Location
Master Out       :   0.0 dBV    -      16/fs         Rear I/O Panel
AUX Out          :   0.0 dBV    -      16/fs         Rear I/O Panel
Center/LFE Out   :   0.0 dBV    -      16/fs         Rear I/O Panel
Mic 1            :   0.0 dBV    -      16/fs         Rear I/O Panel
Mic 2            :   0.0 dBV    -      16/fs         Rear I/O Panel
Line In          :   0.0 dBV    -      16/fs         Rear I/O Panel



AD18XX configuration
Unchained        : 0x1000,0x0000,0x0000
Chained          : 0x0000,0x0000,0x0000

root@ds19:~> cat /proc/asound/card0/codec97#0/ac97#0-0+regs
0:00 = 0090
0:02 = 0404
0:04 = 0606
0:06 = 0006
0:08 = 0000
0:0a = 0000
0:0c = 801f
0:0e = 0040
0:10 = 9f9f
0:12 = 0606
0:14 = 0000
0:16 = 9f9f
0:18 = 0606
0:1a = 0000
0:1c = 0000
0:1e = 0000
0:20 = 0000
0:22 = 0000
0:24 = 0000
0:26 = 800f
0:28 = 0bc7
0:2a = 05f1
0:2c = bb80
0:2e = bb80
0:30 = bb80
0:32 = bb80
0:34 = 0000
0:36 = 0300
0:38 = 0202
0:3a = 2a20
0:3c = 0000
0:3e = 0000
0:40 = 0000
0:42 = 0000
0:44 = 0000
0:46 = 0000
0:48 = 0000
0:4a = 0000
0:4c = 0000
0:4e = 0000
0:50 = 0000
0:52 = 0000
0:54 = 0000
0:56 = 0000
0:58 = 0000
0:5a = 0000
0:5c = 1000
0:5e = 0000
0:60 = 8080
0:62 = 0000
0:64 = 0000
0:66 = 0000
0:68 = 0000
0:6a = 0000
0:6c = 8080
0:6e = 8080
0:70 = 0000
0:72 = 0000
0:74 = 1001
0:76 = 7c7c
0:78 = 0000
0:7a = 0000
0:7c = 4144
0:7e = 5378

root@ds19:~> cat /proc/asound/cards
 0 [ICH6           ]: ICH4 - Intel ICH6
                      Intel ICH6 with AD1986 at 0xf0140800, irq 16

root@ds19:~> lspci
00:00.0 Host bridge: Intel Corporation 82915G/P/GV/GL/PL/910GL Memory 
Controller Hub (rev 04)
00:02.0 VGA compatible controller: Intel Corporation 82915G/GV/910GL 
Integrated Graphics Controller (rev 04)
00:02.1 Display controller: Intel Corporation 82915G Integrated Graphics 
Controller (rev 04)
00:1c.0 PCI bridge: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) PCI 
Express Port 1 (rev 03)
00:1c.1 PCI bridge: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) PCI 
Express Port 2 (rev 03)
00:1c.2 PCI bridge: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) PCI 
Express Port 3 (rev 03)
00:1c.3 PCI bridge: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) PCI 
Express Port 4 (rev 03)
00:1d.0 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) 
USB UHCI #1 (rev 03)
00:1d.1 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) 
USB UHCI #2 (rev 03)
00:1d.2 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) 
USB UHCI #3 (rev 03)
00:1d.3 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) 
USB UHCI #4 (rev 03)
00:1d.7 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) 
USB2 EHCI Controller (rev 03)
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev d3)
00:1e.2 Multimedia audio controller: Intel Corporation 82801FB/FBM/FR/FW/FRW 
(ICH6 Family) AC'97 Audio Controller (rev 03)
00:1f.0 ISA bridge: Intel Corporation 82801FB/FR (ICH6/ICH6R) LPC Interface 
Bridge (rev 03)
00:1f.1 IDE interface: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) 
IDE Controller (rev 03)
00:1f.2 IDE interface: Intel Corporation 82801FB/FW (ICH6/ICH6W) SATA 
Controller (rev 03)
00:1f.3 SMBus: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) SMBus 
Controller (rev 03)
07:00.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5751 Gigabit 
Ethernet PCI Express (rev 01)

root@ds19:~> lsmod | grep snd
snd_intel8x0           31420  1
snd_ac97_codec         89412  1 snd_intel8x0
ac97_bus                2432  1 snd_ac97_codec
snd_pcm_oss            39232  0
snd_mixer_oss          15488  1 snd_pcm_oss
snd_pcm                72036  3 snd_intel8x0,snd_ac97_codec,snd_pcm_oss
snd_timer              20964  1 snd_pcm
snd                    48196  8 
snd_intel8x0,snd_ac97_codec,snd_pcm_oss,snd_mixer_oss,snd_pcm,snd_timer
soundcore               7616  1 snd
snd_page_alloc          9736  2 snd_intel8x0,snd_pcm

regards,
Jörg
Grüße,
Jörg

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