Hi,
I'm currently running a stock Linux kernel 3.10.6 on a MacBook Air mid 2012. The ALSA module is running with no user-provided parameters.
This computer has an Intel Corporation 7 Series/C210 Series Chipset Family High Definition Audio Controller (rev 04).
The speakers work fine, but the microphone fails to work in two scenarios:
1. After resuming the computer from suspend
2. If audio codec power management is enabled
I should note that the stock setup is a bit weird, as I can only record sounds with the microphone if I capture stereo sound. Under mono settings, I cannot hear anything. The microphone is mono, but this is mapped to the right channel, which is only recorded by arecord under stereo settings.
Furthermore, I cannot see a mic channel in alsamixer. Only a mic boost channel. I don't know if this is the expected behavior:
Simple mixer control 'Master',0
Capabilities: pvolume pvolume-joined pswitch pswitch-joined
Playback channels: Mono
Limits: Playback 0 - 127
Mono: Playback 89 [70%] [-19.00dB] [on]
Simple mixer control 'Headphone',0
Capabilities: pvolume pswitch
Playback channels: Front Left - Front Right
Limits: Playback 0 - 127
Mono:
Front Left: Playback 115 [91%] [0.00dB] [on]
Front Right: Playback 115 [91%] [0.00dB] [on]
Simple mixer control 'Speaker',0
Capabilities: pvolume pswitch
Playback channels: Front Left - Front Right
Limits: Playback 0 - 127
Mono:
Front Left: Playback 116 [91%] [0.50dB] [on]
Front Right: Playback 116 [91%] [0.50dB] [on]
Simple mixer control 'PCM',0
Capabilities: pvolume
Playback channels: Front Left - Front Right
Limits: Playback 0 - 255
Mono:
Front Left: Playback 255 [100%] [0.00dB]
Front Right: Playback 255 [100%] [0.00dB]
Simple mixer control 'Mic Boost',0
Capabilities: volume
Playback channels: Front Left - Front Right
Capture channels: Front Left - Front Right
Limits: 0 - 3
Front Left: 2 [67%] [20.00dB]
Front Right: 2 [67%] [20.00dB]
Simple mixer control 'IEC958',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [on]
Simple mixer control 'IEC958',1
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [on]
Simple mixer control 'IEC958',2
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [on]
Simple mixer control 'Capture',0
Capabilities: cvolume cswitch
Capture channels: Front Left - Front Right
Limits: Capture 0 - 63
Front Left: Capture 63 [100%] [12.00dB] [on]
Front Right: Capture 63 [100%] [12.00dB] [on]
Simple mixer control 'Auto-Mute Mode',0
Capabilities: enum
Items: 'Disabled' 'Enabled'
Item0: 'Enabled'
Simple mixer control 'Digital',0
Capabilities: cvolume
Capture channels: Front Left - Front Right
Limits: Capture 0 - 120
Front Left: Capture 87 [72%] [13.50dB]
Front Right: Capture 87 [72%] [13.50dB]
Thanks,
A.
I'm currently running a stock Linux kernel 3.10.6 on a MacBook Air mid 2012. The ALSA module is running with no user-provided parameters.
This computer has an Intel Corporation 7 Series/C210 Series Chipset Family High Definition Audio Controller (rev 04).
The speakers work fine, but the microphone fails to work in two scenarios:
1. After resuming the computer from suspend
2. If audio codec power management is enabled
I should note that the stock setup is a bit weird, as I can only record sounds with the microphone if I capture stereo sound. Under mono settings, I cannot hear anything. The microphone is mono, but this is mapped to the right channel, which is only recorded by arecord under stereo settings.
Furthermore, I cannot see a mic channel in alsamixer. Only a mic boost channel. I don't know if this is the expected behavior:
Simple mixer control 'Master',0
Capabilities: pvolume pvolume-joined pswitch pswitch-joined
Playback channels: Mono
Limits: Playback 0 - 127
Mono: Playback 89 [70%] [-19.00dB] [on]
Simple mixer control 'Headphone',0
Capabilities: pvolume pswitch
Playback channels: Front Left - Front Right
Limits: Playback 0 - 127
Mono:
Front Left: Playback 115 [91%] [0.00dB] [on]
Front Right: Playback 115 [91%] [0.00dB] [on]
Simple mixer control 'Speaker',0
Capabilities: pvolume pswitch
Playback channels: Front Left - Front Right
Limits: Playback 0 - 127
Mono:
Front Left: Playback 116 [91%] [0.50dB] [on]
Front Right: Playback 116 [91%] [0.50dB] [on]
Simple mixer control 'PCM',0
Capabilities: pvolume
Playback channels: Front Left - Front Right
Limits: Playback 0 - 255
Mono:
Front Left: Playback 255 [100%] [0.00dB]
Front Right: Playback 255 [100%] [0.00dB]
Simple mixer control 'Mic Boost',0
Capabilities: volume
Playback channels: Front Left - Front Right
Capture channels: Front Left - Front Right
Limits: 0 - 3
Front Left: 2 [67%] [20.00dB]
Front Right: 2 [67%] [20.00dB]
Simple mixer control 'IEC958',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [on]
Simple mixer control 'IEC958',1
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [on]
Simple mixer control 'IEC958',2
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [on]
Simple mixer control 'Capture',0
Capabilities: cvolume cswitch
Capture channels: Front Left - Front Right
Limits: Capture 0 - 63
Front Left: Capture 63 [100%] [12.00dB] [on]
Front Right: Capture 63 [100%] [12.00dB] [on]
Simple mixer control 'Auto-Mute Mode',0
Capabilities: enum
Items: 'Disabled' 'Enabled'
Item0: 'Enabled'
Simple mixer control 'Digital',0
Capabilities: cvolume
Capture channels: Front Left - Front Right
Limits: Capture 0 - 120
Front Left: Capture 87 [72%] [13.50dB]
Front Right: Capture 87 [72%] [13.50dB]
Thanks,
A.
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