desktop-packages team mailing list archive

[kirby_33 <kirby_33@xxxxxxxxxx>]

Hello, I don't know if my message can help somebody, but i have a similar problem with my laptop (MSI GT60 2PE dominator 3K).
I don't have found a solution and I am not able to explain the real problem... However I have a workaround.

My laptop use a dual boot with Ubuntu 14.04 and Windows 8.1 and I have
an optimus configuration for my video card (Intel/NVIDIA)

First I will start by explain the procedure to reproduce the bug.
At the begining, I am on linux with my NVIDIA card activated. If I connect an hdmi cable, there is no problem. I just need to select the hdmi audio device with Pulseaudio. However the video and the sound works fine with the hdmi output! 

Now I remove the hdmi cable and I shutdown my computer.
I reboot now using Windows 8.1 (without HDMI cable!!)

I reboot again on ubuntu. But now, if I connect again the HDMI cable, the video works but there is no sound.
The audio device is not detected. I can switch on the intel card and come back on the NVIDIA but it the same.
I can reinstall the nvidia driver, reinstall pulseaudio, reboot .... But nothing works!! The hdmi audio device has disapeared!!!

The only one solution is to reboot on windows 8.1. I connect the hdmi
cable, I check the sound works (on windows) and I shutdown the computer.

Now if i reboot on linux the audio device is back!!!   :)

This is just a workaround, but it is not a solution...  :(

-- 
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/1377653

Title:
  HDMI sound output not detected / NVIDIA optimus laptop

Status in alsa-driver package in Ubuntu:
  Confirmed

Bug description:
  Hi,

  not sure if this is an alsa or nvidia/nouveau bug.
  HDMI audio output doesn't appear in sound settings output panel.
  Audio works well on internal speakers, but it seems there is no way to make it output to hdmi...

  The laptop has optimus NVIDIA+Intel.
  The behaviour is the same with nouveau or nvidia proprietary driver.

  Please let me know if further testing is required

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: alsa-base 1.0.25+dfsg-0ubuntu4
  ProcVersionSignature: Ubuntu 3.13.0-36.63-generic 3.13.11.6
  Uname: Linux 3.13.0-36-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.14.1-0ubuntu3.5
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  sam        2295 F.... pulseaudio
  CurrentDesktop: Unity
  CurrentDmesg: Error: command ['sh', '-c', 'dmesg | comm -13 --nocheck-order /var/log/dmesg -'] failed with exit code 1: comm: /var/log/dmesg: Permission denied
  Date: Sun Oct  5 17:05:35 2014
  InstallationDate: Installed on 2014-04-21 (166 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  PackageArchitecture: all
  SourcePackage: alsa-driver
  Symptom: audio
  Title: PCI/internal sound card not detected
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 11/02/2012
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: N56VZ.215
  dmi.board.asset.tag: ATN12345678901234567
  dmi.board.name: N56VZ
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: 1.0
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: ASUSTeK COMPUTER INC.
  dmi.chassis.version: 1.0
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrN56VZ.215:bd11/02/2012:svnASUSTeKCOMPUTERINC.:pnN56VZ:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnN56VZ:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
  dmi.product.name: N56VZ
  dmi.product.version: 1.0
  dmi.sys.vendor: ASUSTeK COMPUTER INC.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1377653/+subscriptions