Comment 8 for bug 682617

>>* alsa-info.txt.FbRz3szq16 (28.0 KiB, text/plain)

>> Alsainfo for Maverick

There is only one capture subdevice but two capture volume controls/switches and two input sources

ARECORD

**** List of CAPTURE Hardware Devices ****
card 0: Intel [HDA Intel], device 0: ALC259 Analog [ALC259 Analog]
  Subdevices: 0/1
  Subdevice #0: subdevice #0

if HDA controller does not have enough DMA for two capture subdevices for multistream capture , why the driver build two capture volume controls /switches and "Input Source" controls

Simple mixer control 'Capture',0
  Capabilities: cvolume cswitch penum
  Capture channels: Front Left - Front Right
  Limits: Capture 0 - 31
  Front Left: Capture 11 [35%] [0.00dB] [on]
  Front Right: Capture 11 [35%] [0.00dB] [on]
Simple mixer control 'Capture',1
  Capabilities: cvolume cswitch penum
  Capture channels: Front Left - Front Right
  Limits: Capture 0 - 31
  Front Left: Capture 0 [0%] [-16.50dB] [on]
  Front Right: Capture 0 [0%] [-16.50dB] [on]
Simple mixer control 'Input Source',0
  Capabilities: cenum
  Items: 'Mic' 'Front Mic'
  Item0: 'Mic'
Simple mixer control 'Input Source',1
  Capabilities: cenum
  Items: 'Mic' 'Front Mic'
  Item0: 'Mic'