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[Bug 1367671] Re: [Dell Latitude E7240] mini-displayport audio only works via cold-plug or resume from suspend


Taihsiang Ho, thank you for reporting this and helping make Ubuntu

As per http://www.dell.com/support/home/us/en/19/product-
support/product/latitude-e7240-ultrabook/drivers/advanced an update to
your computer's buggy and outdated BIOS is available (A17). If you
update to this following https://help.ubuntu.com/community/BIOSUpdate
does it change anything?

Once the BIOS is updated, if the problem is still reproducible:
1) Please provide the output of the following terminal command:
sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date
2) Please make a comment specifically advising on if there was an improvement or not.
3) Please mark this report Status Confirmed. If it's not reproducible, please mark this as Invalid.

Thank you for your understanding.

** Tags added: bios-outdated-a17

** Package changed: linux-lts-trusty (Ubuntu) => linux (Ubuntu)

** Changed in: linux (Ubuntu)
       Status: New => Incomplete

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  [Dell Latitude E7240] mini-displayport audio only works via cold-plug
  or resume from suspend

Status in linux package in Ubuntu:

Bug description:
  Dell Latitude E7240 (CID 201304-13407) on ubuntu 12.04.5

  Steps to reproduce this bug:
  1. plug in the mini display port to an external monitor with speaks.
  2. click the sound indicator on the unity desktop to choose the correct audio source and test the audio

  Expected result:
  there should be displayport audio source ready for you to select.

  Actual result:
  No such audio source

  More information:
  1. the audio source could pop up if you cold boot or suspend-resume.
  2. HDMI audio of this system could work as hot plug.


  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: linux-image-3.13.0-32-generic 3.13.0-32.57~precise1 [modified: boot/vmlinuz-3.13.0-32-generic]
  ProcVersionSignature: Ubuntu 3.13.0-32.57~precise1-generic
  Uname: Linux 3.13.0-32-generic x86_64
  AlsaVersion: Advanced Linux Sound Architecture Driver Version k3.13.0-32-generic.
  ApportVersion: 2.0.1-0ubuntu17.7
  Architecture: amd64
   **** List of CAPTURE Hardware Devices ****
   card 1: PCH [HDA Intel PCH], device 0: ALC292 Analog [ALC292 Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
   /dev/snd/controlC1:  ubuntu     1726 F.... pulseaudio
   /dev/snd/controlC0:  ubuntu     1726 F.... pulseaudio
  CRDA: Error: [Errno 2] No such file or directory
   Card hw:0 'HDMI'/'HDA Intel HDMI at 0xf7e34000 irq 64'
     Mixer name	: 'Intel Haswell HDMI'
     Components	: 'HDA:80862807,80860101,00100000'
     Controls      : 21
     Simple ctrls  : 3
   Card hw:1 'PCH'/'HDA Intel PCH at 0xf7e30000 irq 65'
     Mixer name	: 'Realtek ALC292'
     Components	: 'HDA:10ec0292,102805ca,00100001'
     Controls      : 28
     Simple ctrls  : 13
  Date: Wed Sep 10 05:43:00 2014
  HibernationDevice: RESUME=UUID=12a1f163-a692-48a5-ad30-3bb81ec765d7
  InstallationMedia: Ubuntu 12.04.5 LTS "Precise Pangolin" - Release amd64 (20140807.1)
  MachineType: Dell Inc. Latitude E7240
  MarkForUpload: True
   PATH=(custom, no user)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-32-generic root=UUID=357c487a-9f05-4648-995c-b870064d383c ro quiet splash initcall_debug vt.handoff=7
   linux-restricted-modules-3.13.0-32-generic N/A
   linux-backports-modules-3.13.0-32-generic  N/A
   linux-firmware                             1.79.16
  SourcePackage: linux-lts-trusty
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 10/05/2013
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A05
  dmi.board.name: 0G05MN
  dmi.board.vendor: Dell Inc.
  dmi.board.version: X01
  dmi.chassis.type: 9
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA05:bd10/05/2013:svnDellInc.:pnLatitudeE7240:pvr01:rvnDellInc.:rn0G05MN:rvrX01:cvnDellInc.:ct9:cvr:
  dmi.product.name: Latitude E7240
  dmi.product.version: 01
  dmi.sys.vendor: Dell Inc.

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