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[Raymond <1511148@xxxxxxxxxxxxxxxxxx>]

Node 0x21 [Volume Knob Widget] wcaps 0x600080: Mono
  Volume-Knob: delta=0, steps=32, direct=0, val=64
  Unsolicited: tag=00, enabled=0
  Connection: 0


volume knob seem not enabled

do you mean thr driver enable volume knob in previous version ?


https://bugzilla.kernel.org/enter_bug.cgi?product=Drivers


you need to file upstream bug report if it is a regression

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https://bugs.launchpad.net/bugs/1511148

Title:
  no sound at all on toshiba portege r500-12p

Status in alsa-driver package in Ubuntu:
  New

Bug description:
  small toshiba notebook
  portege  r500-12p
  Model PPR50E-06W09QGR

  alsamixer app shows a sound card, all chanels enabled.
  notebook got a rotary encoder volume wheel that seems to be supported by linux, since the volume popup/overlay pops up if used. but there is no sound at all. never. 

  same on ubuntu 15.05 and 14.04lts

  didnt found any help or solution on the net yet.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: alsa-base 1.0.25+dfsg-0ubuntu4
  ProcVersionSignature: Ubuntu 3.13.0-66.108-generic 3.13.11-ckt27
  Uname: Linux 3.13.0-66-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.18
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  user       1419 F.... lxpanel
  Date: Thu Oct 29 00:14:37 2015
  InstallationDate: Installed on 2015-10-28 (0 days ago)
  InstallationMedia: Ubuntu  "Trusty" - Build amd64 LIVE Binary 20141224-10:35
  PackageArchitecture: all
  SourcePackage: alsa-driver
  Symptom: audio
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 03/04/2008
  dmi.bios.vendor: TOSHIBA
  dmi.bios.version: Version 1.60
  dmi.board.name: Portable PC
  dmi.board.vendor: TOSHIBA
  dmi.board.version: Version A0
  dmi.chassis.asset.tag: 0000000000
  dmi.chassis.type: 10
  dmi.chassis.vendor: TOSHIBA
  dmi.chassis.version: Version 1.0
  dmi.modalias: dmi:bvnTOSHIBA:bvrVersion1.60:bd03/04/2008:svnTOSHIBA:pnPORTEGER500:pvrPPR50E-06W09QGR:rvnTOSHIBA:rnPortablePC:rvrVersionA0:cvnTOSHIBA:ct10:cvrVersion1.0:
  dmi.product.name: PORTEGE R500
  dmi.product.version: PPR50E-06W09QGR
  dmi.sys.vendor: TOSHIBA

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