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[Raymond <1384952@xxxxxxxxxxxxxxxxxx>]

https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/commit/sound/usb?id=5ee20bc792467d7d612157e0a9962765aa943b08

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https://bugs.launchpad.net/bugs/1384952

Title:
  USB Soundcard no microphone (input) device

Status in alsa-driver package in Ubuntu:
  Confirmed

Bug description:
  My Asus Xonar U7 Echelon External sound device working without input/capture device.
  No input device , Nothing recording with my usb soundcard. 

  ~$ arecord -l
  **** List of CAPTURE Hardware Devices ****
  card 1: Ed [Xonar U7 Echelon Ed.], device 1: USB Audio [USB Audio #1]
    Subdevices: 1/1
    Subdevice #0: subdevice #0

  ~$ lsusb
  Bus 002 Device 002: ID 1043:85c1 iCreate Technologies Corp.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: alsa-base 1.0.25+dfsg-0ubuntu4
  Uname: Linux 3.17.1-031701-generic x86_64
  NonfreeKernelModules: fglrx
  ApportVersion: 2.14.1-0ubuntu3.5
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  alper      2249 F.... pulseaudio
   /dev/snd/pcmC1D0p:   alper      2249 F...m pulseaudio
   /dev/snd/controlC1:  alper      2249 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Fri Oct 24 00:46:11 2014
  InstallationDate: Installed on 2014-10-07 (16 days ago)
  InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  PackageArchitecture: all
  SourcePackage: alsa-driver
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 02/04/2013
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: V2.2
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: 970A-G46 (MS-7693)
  dmi.board.vendor: MSI
  dmi.board.version: 2.0
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 3
  dmi.chassis.vendor: MSI
  dmi.chassis.version: 2.0
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrV2.2:bd02/04/2013:svnMSI:pnMS-7693:pvr2.0:rvnMSI:rn970A-G46(MS-7693):rvr2.0:cvnMSI:ct3:cvr2.0:
  dmi.product.name: MS-7693
  dmi.product.version: 2.0
  dmi.sys.vendor: MSI
  modified.conffile..etc.modprobe.d.alsa.base.conf: [modified]
  mtime.conffile..etc.modprobe.d.alsa.base.conf: 2014-10-23T19:38:42.156766

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