I've detected that if I assign the sound buttons different keys, that
this works. So although I can assign play to the "Audio play" key, this
is not recognised. But if I assign it to Super+F5 for example, then it
works.

Same for sound up/down. Different keys work, just not the audio keys,
although it appears they are recognised.

BTW, I'm using a laptop + an external keyboard (Razer Blackwidow).

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You received this bug notification because you are a member of Desktop
Packages, which is subscribed to alsa-driver in Ubuntu.
https://bugs.launchpad.net/bugs/1304661

Title:
  Volume lower/raise using keyboard doesn't work

Status in “alsa-driver” package in Ubuntu:
  Confirmed

Bug description:
  Keys are recognised (tested with xev). Mute button works.

  In emacs when I press the volume keys I get something like
  XF86AudioRaiseVolume is undefined.

  So somehow these keys do not reach pulseaudio.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: alsa-base 1.0.25+dfsg-0ubuntu4
  ProcVersionSignature: Ubuntu 3.13.0-23.45-generic 3.13.8
  Uname: Linux 3.13.0-23-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.14.1-0ubuntu1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  berend     5084 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Wed Apr  9 08:34:29 2014
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2014-04-01 (7 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Beta amd64 (20140326)
  PackageArchitecture: all
  SourcePackage: alsa-driver
  Symptom: audio
  Symptom_Card: Built-in Audio - HDA Intel
  Symptom_Type: Volume slider, or mixer problems
  Title: [HDA-Intel - HDA Intel, playback] volume slider problem
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 11/27/2008
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 7ZET71WW (1.54 )
  dmi.board.name: 2757CTO
  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:bvr7ZET71WW(1.54):bd11/27/2008:svnLENOVO:pn2757CTO:pvrThinkPadW700:rvnLENOVO:rn2757CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 2757CTO
  dmi.product.version: ThinkPad W700
  dmi.sys.vendor: LENOVO

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