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 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1267866 Title: Broken pipelline when changing the sound card To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1267866/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs