Binary package hint: linux-image-2.6.15-26-686
This bug has been confirmed on other brands of laptop with the same chipset but there's nothing in malone about the macbook. It seems the same driver can be used for a number of different codecs.
The ALSA driver for this card loads and the mixer settings are displayed properly. Playback with volume control functions and there are options to select between the different capture sources. Unfortunately all the capture sources record silence via the built in microphone. I have not been able to test this with the mini plug microphone input.
An IRC user named crimsun on #ubuntu-laptop said this will be fixed in the next kernel update for dapper but he didn't know if someone had alreaady posted a patch. I searched around and couldn't find a patch either.
Here is the relevant information on the kernel and hardware
lee@priceless:~/tmp$ uname -a
Linux priceless 2.6.15-26-686 #1 SMP PREEMPT Thu Aug 3 03:13:28 UTC 2006 i686 GNU/Linux
lee@priceless:~/tmp$ lspci | grep Audio
0000:00:1b.0 0403: Intel Corporation 82801G (ICH7 Family) High Definition Audio Controller (rev 02)
lee@priceless:~/tmp$ cat /proc/asound/version
Advanced Linux Sound Architecture Driver Version 1.0.10rc3 (Mon Nov 07 13:30:21 2005 UTC).
lee@priceless:~/tmp$ cat /proc/asound/cards
0 [Intel ]: HDA-Intel - HDA Intel
HDA Intel at 0x90440000 irq 209
lee@priceless:~/tmp$ cat /proc/asound/devices
17: [0- 1]: digital audio playback
16: [0- 0]: digital audio playback
24: [0- 0]: digital audio capture
0: [0- 0]: ctl
33: : timer
lspci -nv
0000:00:1b.0 0403: 8086:27d8 (rev 02)
Subsystem: 8384:7680
Flags: bus master, fast devsel, latency 0, IRQ 209
Memory at 90440000 (64-bit, non-prefetchable) [size=16K]
Capabilities: [50] Power Management version 2
Capabilities: [60] Message Signalled Interrupts: 64bit+ Queue=0/0 Enable-
Capabilities: [70] #10 [0091]
lee@priceless:~/tmp$ cat /proc/asound/card0/codec#0
Codec: SigmaTel STAC9221 A1
Address: 0
Vendor Id: 0x83847680
Subsystem Id: 0x100
Revision Id: 0x103401
Default PCM: rates 0x7e0, bits 0x0e, types 0x1
Default Amp-In caps: ofs=0x00, nsteps=0x0e, stepsize=0x05, mute=1
Default Amp-Out caps: ofs=0x7f, nsteps=0x7f, stepsize=0x02, mute=1
Node 0x02 [Audio Output] wcaps 0xd0c05: Stereo Amp-Out
Amp-Out caps: N/A
Amp-Out vals: [0x7b 0x7b]
Power: 0x0
Node 0x03 [Audio Output] wcaps 0xd0c05: Stereo Amp-Out
Amp-Out caps: N/A
Amp-Out vals: [0x7f 0x7f]
Power: 0x0
Node 0x04 [Audio Output] wcaps 0xd0c05: Stereo Amp-Out
Amp-Out caps: N/A
Amp-Out vals: [0x7f 0x7f]
Power: 0x0
Node 0x05 [Audio Output] wcaps 0xd0c05: Stereo Amp-Out
Amp-Out caps: N/A
Amp-Out vals: [0x7f 0x7f]
Power: 0x0
Node 0x06 [Audio Input] wcaps 0x1d0541: Stereo
Power: 0x0
Connection: 1
0x17
Node 0x07 [Audio Input] wcaps 0x1d0541: Stereo
Power: 0x0
Connection: 1
0x18
Node 0x08 [Audio Output] wcaps 0x40211: Stereo Digital
PCM: rates 0x7e0, bits 0x0e, types 0x5
Node 0x09 [Audio Input] wcaps 0x140311: Stereo Digital
PCM: rates 0x160, bits 0x0e, types 0x5
Connection: 1
0x11
Node 0x0a [Pin Complex] wcaps 0x400181: Stereo
Pincap 0x08173f: IN OUT HP
Pin Default 0x02214020: [Jack] HP Out at Ext Front
Conn = 1/8, Color = Green
Pin-ctls: 0x80: HP
Connection: 1
0x02
Node 0x0b [Pin Complex] wcaps 0x400181: Stereo
Pincap 0x081737: IN OUT
Pin Default 0x01116011: [Jack] Speaker at Ext Rear
Conn = 1/8, Color = Orange
Pin-ctls: 0x60: IN OUT
Connection: 1
0x04
Node 0x0c [Pin Complex] wcaps 0x400181: Stereo
Pincap 0x081737: IN OUT
Pin Default 0x01114010: [Jack] Speaker at Ext Rear
Conn = 1/8, Color = Green
Pin-ctls: 0x20: IN
Connection: 1
0x03
Node 0x0d [Pin Complex] wcaps 0x400181: Stereo
Pincap 0x08173f: IN OUT HP
Pin Default 0x02a19050: [Jack] Mic at Ext Front
Conn = 1/8, Color = Pink
Pin-ctls: 0x40: OUT
Connection: 1
0x02
Node 0x0e [Pin Complex] wcaps 0x400081: Stereo
Pincap 0x0824: IN
Pin Default 0x01813051: [Jack] Line In at Ext Rear
Conn = 1/8, Color = Blue
Pin-ctls: 0x20: IN
Node 0x0f [Pin Complex] wcaps 0x400181: Stereo
Pincap 0x0837: IN OUT
Pin Default 0x01116012: [Jack] Speaker at Ext Rear
Conn = 1/8, Color = Orange
Pin-ctls: 0x40: OUT
Connection: 1
0x05
Node 0x10 [Pin Complex] wcaps 0x400301: Stereo Digital
Pincap 0x0810: OUT
Pin Default 0x01451030: [Jack] SPDIF Out at Ext Rear
Conn = Optical, Color = Black
Pin-ctls: 0x40: OUT
Connection: 3
0x08* 0x17 0x19
Node 0x11 [Pin Complex] wcaps 0x430681: Stereo Digital
Pincap 0x0810024: IN
Pin Default 0x01c51060: [Jack] SPDIF In at Ext Rear
Conn = Optical, Color = Black
Pin-ctls: 0x00:
Power: 0x0
Node 0x12 [Audio Selector] wcaps 0x30010d: Stereo Amp-Out
Amp-Out caps: ofs=0x00, nsteps=0x04, stepsize=0x27, mute=0
Amp-Out vals: [0x04 0x04]
Connection: 7
0x0e* 0x15 0x0f 0x0b 0x0c 0x0d 0x0a
Node 0x13 [Audio Selector] wcaps 0x30010d: Stereo Amp-Out
Amp-Out caps: ofs=0x00, nsteps=0x04, stepsize=0x27, mute=0
Amp-Out vals: [0x00 0x00]
Connection: 7
0x0e 0x15* 0x0f 0x0b 0x0c 0x0d 0x0a
Node 0x14 [Beep Generator Widget] wcaps 0x70000c: Mono Amp-Out
Amp-Out caps: ofs=0x03, nsteps=0x03, stepsize=0x17, mute=0
Amp-Out vals: [0x00]
Node 0x15 [Pin Complex] wcaps 0x400001: Stereo
Pincap 0x0820: IN
Pin Default 0x90330052: [Fixed] CD at Int N/A
Conn = ATAPI, Color = Unknown
Pin-ctls: 0x20: IN
Node 0x16 [Volume Knob Widget] wcaps 0x600000: Mono
Node 0x17 [Audio Selector] wcaps 0x300903: Stereo Amp-In
Amp-In caps: N/A
Amp-In vals: [0x0e 0x0e]
Connection: 1
0x12
Node 0x18 [Audio Selector] wcaps 0x300903: Stereo Amp-In
Amp-In caps: N/A
Amp-In vals: [0x80 0x80]
Connection: 1
0x13
Node 0x19 [Vendor Defined Widget] wcaps 0xf30201: Stereo Digital
Node 0x1a [Audio Output] wcaps 0x30201: Stereo Digital
Node 0x1b [Pin Complex] wcaps 0x400301: Stereo Digital
Pincap 0x0810: OUT
Pin Default 0x90560040: [Fixed] Digital Out at Int N/A
Conn = Digital, Color = Unknown
Pin-ctls: 0x00:
Connection: 1
0x1a
I confirm this bug on my white 2.0 ghz macbook.