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#1 2012-04-20 10:25:37

JoKo
Member
Registered: 2010-04-09
Posts: 37

[SOLVED] MacBook Air 4,2 Internal Microphone not working

Hello,

I have trouble using the microphone of my laptop.

I'm using the currently latest official Arch Linux kernel:

3.3.2-1-ARCH

Here's "lspci":

00:00.0 Host bridge: Intel Corporation 2nd Generation Core Processor Family DRAM Controller (rev 09)
00:01.0 PCI bridge: Intel Corporation Xeon E3-1200/2nd Generation Core Processor Family PCI Express Root Port (rev 09)
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)
00:16.0 Communication controller: Intel Corporation 6 Series/C200 Series Chipset Family MEI Controller #1 (rev 04)
00:1a.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Universal Host Controller #5 (rev 05)
00:1a.7 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #2 (rev 05)
00:1b.0 Audio device: Intel Corporation 6 Series/C200 Series Chipset Family High Definition Audio Controller (rev 05)
00:1c.0 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 1 (rev b5)
00:1c.1 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 2 (rev b5)
00:1d.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Universal Host Controller #1 (rev 05)
00:1d.7 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #1 (rev 05)
00:1f.0 ISA bridge: Intel Corporation QS67 Express Chipset Family LPC Controller (rev 05)
00:1f.2 SATA controller: Intel Corporation 6 Series/C200 Series Chipset Family 6 port SATA AHCI Controller (rev 05)
00:1f.3 SMBus: Intel Corporation 6 Series/C200 Series Chipset Family SMBus Controller (rev 05)
02:00.0 Network controller: Broadcom Corporation BCM43224 802.11a/b/g/n (rev 01)
03:00.0 PCI bridge: Intel Corporation Device 151a (rev 01)
04:00.0 PCI bridge: Intel Corporation Device 151a (rev 01)
04:03.0 PCI bridge: Intel Corporation Device 151a (rev 01)
04:04.0 PCI bridge: Intel Corporation Device 151a (rev 01)
05:00.0 System peripheral: Intel Corporation Device 151a (rev 01)

"arecord -l" shows the following:

**** List of CAPTURE Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: Cirrus Analog [Cirrus Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

Here is the output of "amixer":

Simple mixer control 'Master',0
  Capabilities: pvolume pvolume-joined pswitch pswitch-joined penum
  Playback channels: Mono
  Limits: Playback 0 - 115
  Mono: Playback 69 [60%] [-23.00dB] [on]
Simple mixer control 'Headphone',0
  Capabilities: pvolume pswitch penum
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 115
  Mono:
  Front Left: Playback 105 [91%] [-5.00dB] [off]
  Front Right: Playback 105 [91%] [-5.00dB] [off]
Simple mixer control 'Speaker',0
  Capabilities: pvolume pswitch penum
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 115
  Mono:
  Front Left: Playback 105 [91%] [-5.00dB] [on]
  Front Right: Playback 105 [91%] [-5.00dB] [on]
Simple mixer control 'PCM',0
  Capabilities: pvolume penum
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 255
  Mono:
  Front Left: Playback 231 [91%] [-4.80dB]
  Front Right: Playback 231 [91%] [-4.80dB]
Simple mixer control 'Mic',0
  Capabilities: cvolume penum
  Capture channels: Front Left - Front Right
  Limits: Capture 0 - 3
  Front Left: Capture 3 [100%] [30.00dB]
  Front Right: Capture 3 [100%] [30.00dB]
Simple mixer control 'IEC958',0
  Capabilities: pswitch pswitch-joined penum
  Playback channels: Mono
  Mono: Playback [off]
Simple mixer control 'IEC958',1
  Capabilities: pswitch pswitch-joined penum
  Playback channels: Mono
  Mono: Playback [off]
Simple mixer control 'IEC958',2
  Capabilities: pswitch pswitch-joined penum
  Playback channels: Mono
  Mono: Playback [off]
Simple mixer control 'Capture',0
  Capabilities: cvolume cswitch penum
  Capture channels: Front Left - Front Right
  Limits: Capture 0 - 63
  Front Left: Capture 51 [81%] [0.00dB] [on]
  Front Right: Capture 51 [81%] [0.00dB] [on]
Simple mixer control 'Digital',0
  Capabilities: cvolume penum
  Capture channels: Front Left - Front Right
  Limits: Capture 0 - 120
  Front Left: Capture 0 [0%] [-30.00dB]
  Front Right: Capture 0 [0%] [-30.00dB]

Sounds play just fine by the internal speakers or the headphones.

I'm testing the microphone by using the following commands:

# arecord -d 3 /tmp/test-mic.wav
# aplay /tmp/test-mic.wav

Last edited by JoKo (2012-05-19 09:45:24)

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#2 2012-05-12 01:47:37

ploxiln
Member
Registered: 2006-10-27
Posts: 50

Re: [SOLVED] MacBook Air 4,2 Internal Microphone not working

I'm having the same issue (Macbook Air 4,2 microphone seemingly not working). I didn't look into it much, just tried to use it in skype and hunted in alsamixer for some switch that would have muted it. I would be quite interested if you figured it out smile

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#3 2012-05-12 02:07:24

ploxiln
Member
Registered: 2006-10-27
Posts: 50

Re: [SOLVED] MacBook Air 4,2 Internal Microphone not working

I find it interesting that the ubuntu wiki claims that the microphone works perfectly "out of the box" on 12.04: https://help.ubuntu.com/community/MacBo … Microphone

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#4 2012-05-14 13:58:23

efleming969
Member
Registered: 2007-03-14
Posts: 39

Re: [SOLVED] MacBook Air 4,2 Internal Microphone not working

I'm having the same issue.  Though, interestingly enough, the Google talk plugin picks up the mic just fine for Google+ Hangouts.

Last edited by efleming969 (2012-05-15 01:39:07)

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#5 2012-05-19 09:26:27

JoKo
Member
Registered: 2010-04-09
Posts: 37

Re: [SOLVED] MacBook Air 4,2 Internal Microphone not working

Sorry for not answering this earlier... I have installed pulseaudio and microphone now seems to be working in applications. Anyway, +1 to Google+ Hangouts smile

Last edited by JoKo (2012-05-19 09:27:26)

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#6 2012-06-22 02:36:43

ploxiln
Member
Registered: 2006-10-27
Posts: 50

Re: [SOLVED] MacBook Air 4,2 Internal Microphone not working

I haven't tried pulseaudio yet, but I noticed that it works in audacity if I record in stereo mode (though it only comes in as one channel), and doesn't work in mono mode. Skype, at least, has no option for stereo mode mic; maybe pulseaudio has some extra mapping that fixes this

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#7 2012-10-25 20:28:01

Kukunin
Member
Registered: 2011-04-02
Posts: 6

Re: [SOLVED] MacBook Air 4,2 Internal Microphone not working

I've affected by this issue too. Mic doesn't work in Skype, but works fine in Google Hangouts+.
Is there solution without PulseAudio?

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#8 2012-10-28 21:25:40

JoKo
Member
Registered: 2010-04-09
Posts: 37

Re: [SOLVED] MacBook Air 4,2 Internal Microphone not working

I'm still using PulseAudio, but the official website mentions it as optional. Maybe you are missing a lib32-alsa package?

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#9 2013-08-05 06:05:55

zhehao
Member
Registered: 2010-12-19
Posts: 16

Re: [SOLVED] MacBook Air 4,2 Internal Microphone not working

Has anyone found a fix for this that doesn't involve installing pulseaudio? I just tried installing pulseaudio and it didn't work for me.

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