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[Raymond <1525714@xxxxxxxxxxxxxxxxxx>]

your pci ssid are different

00:14.2 0403: 1002:4383 (rev 40)
	Subsystem: 17aa:21ca

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https://bugs.launchpad.net/bugs/1525714

Title:
  [2545A25, Conexant CX20582 (Pebble), Speaker, Internal] No sound at
  all through speakers on Lenovo Edge 11

Status in alsa-driver package in Ubuntu:
  Incomplete

Bug description:
  Sound through speakers of my Lenovo Edge 11 laptop doesn't work in
  Ubuntu 14.04 nor 12.04 nor 15.10 (LiveCD); I think it last worked in
  10.04 or maybe even only in 8.04.

  This was tested on a clean installation of 14.04 (64bit) onto a USB
  stick, with all upgrades; but it neither works in my normal
  installation (14.04 32bit) which was upgraded over the years. I also
  tried it on a LiveCD boot of 15.10 (64bit), and speakers don't work
  there either.

  The hardware appears to be fine though, because after booting, I
  sometimes hear the short "drum roll" when the login screen comes up,
  but no sound afterwards.

  Headphones work fine; microphone appears to work fine as well (at
  least the input level in Gnome mixer shows that it gets input).

  I had already started to debug the speaker problem some months ago and
  it looked like a problem with power saving mode for the sound chip. If
  you have any hints how to debug this for real, I'm open for
  suggestions. Also, is there any more info I can provide?

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: alsa-base 1.0.25+dfsg-0ubuntu4
  ProcVersionSignature: Ubuntu 3.13.0-71.114-generic 3.13.11-ckt29
  Uname: Linux 3.13.0-71-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.19
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  oliver     1650 F.... pulseaudio
   /dev/snd/controlC0:  oliver     1650 F.... pulseaudio
                        oliver     2210 F.... alsamixer
   /dev/snd/pcmC0D0c:   oliver     1650 F...m pulseaudio
  CurrentDesktop: Unity
  Date: Sun Dec 13 22:42:48 2015
  InstallationDate: Installed on 2015-12-13 (0 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  PackageArchitecture: all
  SourcePackage: alsa-driver
  Symptom: audio
  Symptom_AlsaPlaybackTest: ALSA playback test through plughw:SB failed
  Symptom_Card: Built-in Audio - HDA ATI SB
  Symptom_DevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  oliver     1650 F.... pulseaudio
   /dev/snd/controlC0:  oliver     1650 F.... pulseaudio
                        oliver     2210 F.... alsamixer
   /dev/snd/pcmC0D0c:   oliver     1650 F...m pulseaudio
  Symptom_Jack: Speaker, Internal
  Symptom_Type: No sound at all
  Title: [2545A25, Conexant CX20582 (Pebble), Speaker, Internal] No sound at all
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 01/10/2011
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 87ET35WW (1.09 )
  dmi.board.name: 2545A25
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Available
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvr87ET35WW(1.09):bd01/10/2011:svnLENOVO:pn2545A25:pvrThinkPadEdge:rvnLENOVO:rn2545A25:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 2545A25
  dmi.product.version: ThinkPad Edge
  dmi.sys.vendor: LENOVO

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