do you find any error message in system log (dmesg) ?
An error is thrown:
$ alsactl store -f abc.txt
alsactl: get_control:256: Cannot read control '2,0,0,PCM Capture Source,0':
Broken pipe
Unit: 20
Control: name="PCM Capture Source", index=0
Info: id=20, control=0, cmask=0x0, channels=1, type="U8"
Volume: min=1, max=2, dBmin=0, dBmax=0
control.8 {
iface MIXER
name 'PCM Capture Source'
value Mic
comment {
access 'read write'
type ENUMERATED
count 1
item.0 Mic
item.1 Line
}
AudioControl Interface Descriptor:
bLength 9
bDescriptorType 36
bDescriptorSubtype 1 (HEADER)
bcdADC 2.00
bCategory 10
wTotalLength 256
bmControl 0x00
AudioControl Interface Descriptor:
bLength 17
bDescriptorType 36
bDescriptorSubtype 2 (INPUT_TERMINAL)
bTerminalID 1
wTerminalType 0x0101 USB Streaming
bAssocTerminal 0
bCSourceID 18
bNrChannels 0
bmChannelConfig 0x00000000
bmControls 0x0040
Cluster Control (read-only)
iChannelNames 0
iTerminal 0
AudioControl Interface Descriptor:
bLength 17
bDescriptorType 36
bDescriptorSubtype 2 (INPUT_TERMINAL)
bTerminalID 2
wTerminalType 0x0101 USB Streaming
bAssocTerminal 0
bCSourceID 19
bNrChannels 0
bmChannelConfig 0x00000000
bmControls 0x0040
Cluster Control (read-only)
iChannelNames 0
iTerminal 0
AudioControl Interface Descriptor:
bLength 17
bDescriptorType 36
bDescriptorSubtype 2 (INPUT_TERMINAL)
bTerminalID 4
wTerminalType 0x0201 Microphone
bAssocTerminal 0
bCSourceID 22
bNrChannels 2
bmChannelConfig 0x00000003
Front Left (FL)
Front Right (FR)
bmControls 0x0044
Connector Control (read-only)
Cluster Control (read-only)
iChannelNames 0
iTerminal 0
AudioControl Interface Descriptor:
bLength 17
bDescriptorType 36
bDescriptorSubtype 2 (INPUT_TERMINAL)
bTerminalID 5
wTerminalType 0x0603 Line Connector
bAssocTerminal 0
bCSourceID 22
bNrChannels 2
bmChannelConfig 0x00000003
Front Left (FL)
Front Right (FR)
bmControls 0x0044
Connector Control (read-only)
Cluster Control (read-only)
iChannelNames 0
iTerminal 0
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https://bugs.launchpad.net/bugs/1267866
Title:
Broken pipelline when changing the sound card
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