[alsa-devel] External sound card issue

[Raymond Yau]

2014/1/20 Clemens Ladisch <clemens at ladisch.de>

> Ionica Bizau wrote:
> > I have just bought an external sound card: Asus Xonar U7
> >
> >     cannot load mixer controls: Broken pipe
>
> This looks like a bug in the device's firmware.
>
> Can you at least read the list of controls ("amixer -c1 controls")?
> Are there some controls that you are able to access (try
> "amixer -c1 cget name='xxx'" for each one)?
>
>
alsactl store -f abc.txt
alsactl: get_control:256: Cannot read control '2,0,0,PCM Capture Source,0':
Broken

[ 398.119996] cannot get ctl value: req = 0x81, wValue = 0x0, wIndex =
0x1400, type = 3

seem fail to read the capture source control


state.Device {
 control.1 {
  iface PCM
  name 'Playback Channel Map'
  value.0 0
  value.1 0
  comment {
   access read
   type INTEGER
   count 2
   range '0 - 36'
  }
 }
 control.2 {
  iface PCM
  device 1
  name 'Playback Channel Map'
  value.0 0
  value.1 0
  comment {
   access read
   type INTEGER
   count 2
   range '0 - 36'
  }
 }
 control.3 {
  iface MIXER
  name 'PCM Playback Switch'
  value true
  comment {
   access 'read write'
   type BOOLEAN
   count 1
  }
 }
 control.4 {
  iface MIXER
  name 'PCM Playback Switch'
  index 1
  value true
  comment {
   access 'read write'
   type BOOLEAN
   count 1
  }
 }
 control.5 {
  iface MIXER
  name 'PCM Playback Volume'
  value.0 107
  value.1 107
  value.2 107
  value.3 107
  value.4 107
  value.5 107
  value.6 107
  value.7 107
  comment {
   access 'read write'
   type INTEGER
   count 8
   range '0 - 127'
   dbmin -12700
   dbmax 0
   dbvalue.0 -2000
   dbvalue.1 -2000
   dbvalue.2 -2000
   dbvalue.3 -2000
   dbvalue.4 -2000
   dbvalue.5 -2000
   dbvalue.6 -2000
   dbvalue.7 -2000
  }
 }
 control.6 {
  iface MIXER
  name 'Mic Capture Switch'
  value true
  comment {
   access 'read write'
   type BOOLEAN
   count 1
  }
 }
 control.7 {
  iface MIXER
  name 'Line Capture Switch'
  value true
  comment {
   access 'read write'
   type BOOLEAN
   count 1
  }
 }
 control.8 {
  iface MIXER
  name 'PCM Capture Source'
  value Mic
  comment {
   access 'read write'
   type ENUMERATED
   count 1
   item.0 Mic
   item.1 Line
  }
 }
}