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[Raymond <1530004@xxxxxxxxxxxxxxxxxx>]

ports:
		analog-input-front-mic: Front Microphone (priority 8500, latency offset 0 usec, available: no)
			properties:
				device.icon_name = "audio-input-microphone"
		analog-input-rear-mic: Rear Microphone (priority 8200, latency offset 0 usec, available: yes)
			properties:
				device.icon_name = "audio-input-microphone"
		analog-input-linein: Line In (priority 8100, latency offset 0 usec, available: yes)
			properties:
				
	active port: <analog-input-rear-mic>

if rear mic and line in were retasked , why rear mic still active port

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https://bugs.launchpad.net/bugs/1530004

Title:
  output volume is randomly changing level

Status in alsa-driver package in Ubuntu:
  Incomplete

Bug description:
  I've confirmed that the volume control for the PC is changing of it's
  own volition.  The volume applet in the top pane (using Ubuntu Gnome
  15.10) and the volume sliders in alsamixer are changing every 10
  seconds to a random level.  The interval of the changes is not
  periodic (random time interval and output volume).  It does look like
  the fader goes to zero before choosing a new random volume level.

  I am running 5.1 surround, and the motherboard supports the feature.
  I had this problem while running while 15.04 with a single stereo
  (green jack, rear) output speaker system.  It seemed to be repaired in
  an update, because the issue disappeared after a  while.  I removed
  the USB peripherals that I usually have attached which control volume
  (eg keyboard) I even went as far as to disable bluetooth in case that
  was causing issues.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: alsa-base 1.0.25+dfsg-0ubuntu5
  ProcVersionSignature: Ubuntu 4.2.0-22.27-generic 4.2.6
  Uname: Linux 4.2.0-22-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.19.1-0ubuntu5
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  jamie      1543 F.... pulseaudio
   /dev/snd/controlC2:  jamie      1543 F.... pulseaudio
   /dev/snd/controlC0:  jamie      1543 F.... pulseaudio
  CurrentDesktop: GNOME
  Date: Tue Dec 29 21:00:05 2015
  InstallationDate: Installed on 2015-12-29 (0 days ago)
  InstallationMedia: Ubuntu-GNOME 15.10 "Wily Werewolf" - Release amd64 (20151021)
  PackageArchitecture: all
  SourcePackage: alsa-driver
  Symptom: audio
  Symptom_Card: Built-in Audio - HDA Intel PCH
  Symptom_Jack: Green Line Out, Rear
  Symptom_Type: Volume slider, or mixer problems
  Title: [All Series, Realtek ALC887-VD, Green Line Out, Rear] volume slider problem
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 04/16/2015
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 2103
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: B85M-G R2.0
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: Rev X.0x
  dmi.chassis.asset.tag: Asset-1234567890
  dmi.chassis.type: 3
  dmi.chassis.vendor: Chassis Manufacture
  dmi.chassis.version: Chassis Version
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr2103:bd04/16/2015:svnASUS:pnAllSeries:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnB85M-GR2.0:rvrRevX.0x:cvnChassisManufacture:ct3:cvrChassisVersion:
  dmi.product.name: All Series
  dmi.product.version: System Version
  dmi.sys.vendor: ASUS

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