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[Daniel Jared Dominguez <1413446@xxxxxxxxxxxxxxxxxx>]

Chris: I'm well aware of the newer BIOS versions. I work at Dell on
Project Sputnik. The issue is that the I2S audio mode is not well
supported. There is now a quirk in the Linux kernel that sets the ACPI
_REV reported to the firmware to 5 only if on certain systems needing to
be quirked. (Setting _REV to 2 results in our firmware configuring audio
the same way it would be on Windows 8.1 and Windows 10.) It would be
wonderful if this quirk did not need to exist in perpetuity, especially
since more and more systems will be using I2S audio in the future.

** Tags removed: bios-outdated-a05

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https://bugs.launchpad.net/bugs/1413446

Title:
  [Dell XPS 13 9343] Audio broken with I2S mode in Ubuntu 14.10/15.04

Status in Dell Sputnik:
  Invalid
Status in HWE Next:
  Invalid
Status in linux package in Ubuntu:
  Won't Fix
Status in linux package in Fedora:
  Unknown

Bug description:
  Please read this first before considering making a comment:
  The root cause of the scope of this bug report was caused by a BIOS error in BIOS A01 that put the sound in an undefined mode that wasn't really I2S and wasn't really HDA. This has been fixed by BIOS A02 ( or later ).

  There was an _REV patch that was proposed but not merged upstream. If
  that (or something similar to it) does get merged upstream, then with
  BIOS A02+ the audio will operate in I2S mode.

  If you have a problem with your computer, please do not make comments
  here, as this bug report is considered closed. Instead file a new
  report following https://wiki.ubuntu.com/ReportingBugs . Your issue
  will not be dealt with by making comments in this report, and will
  likely be completely ignored.

  (This is a public bug report for LP1402828.)

  This system has a dual-mode audio with an HDA and an I2S interface.
  Which shows up depends on the reported _OSI from the last cold boot.
  Since the kernels in Ubuntu 14.10/15.04 (15.04 uses 3.18 currently)
  report an _OSI of "Windows 2013", I2S mode is used for audio.

  A workaround is to pass acpi_os="!Windows 2013" as a kernel parameter,
  but this is non-optimal since the mode of the touchpad is affected. It
  also results in an alternate, less used and tested path in the
  firmware to be used.

  See the attached dmesg log for details on where the failure happens.
  Notably,

  $ dmesg -t | egrep "(audio|snd|INT3438)"
  dmar: ACPI device "INT3438:00" under DMAR at fed91000 as 00:13.0
  snd_hda_intel 0000:00:03.0: enabling device (0000 -> 0002)
  snd_hda_intel 0000:00:03.0: irq 50 for MSI/MSI-X
  haswell-pcm-audio haswell-pcm-audio: error: ADSP boot timeout
  broadwell-audio broadwell-audio: ASoC: CPU DAI System Pin not registered
  platform broadwell-audio: Driver broadwell-audio requests probe deferral

  There's also a failure to load the codec firmware after a
  suspend/resume.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: linux-image-3.18.0-9-generic 3.18.0-9.10
  ProcVersionSignature: Ubuntu 3.18.0-9.10-generic 3.18.2
  Uname: Linux 3.18.0-9-generic x86_64
  ApportVersion: 2.15.1-0ubuntu2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  jared      2139 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Wed Jan 21 20:47:40 2015
  HibernationDevice: RESUME=UUID=af18bf4f-1453-4c8c-8b8e-abdc5d4e0674
  InstallationDate: Installed on 2014-11-03 (80 days ago)
  InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  Lsusb:
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 004: ID 0c45:670c Microdia
   Bus 001 Device 003: ID 04f3:2051 Elan Microelectronics Corp.
   Bus 001 Device 002: ID 8087:0a2a Intel Corp.
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: Dell Inc. XPS 13 9343
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.18.0-9-generic root=/dev/mapper/ubuntu--vg-root ro video.use_native_backlight=1 video.use_native_backlight=1
  RelatedPackageVersions:
   linux-restricted-modules-3.18.0-9-generic N/A
   linux-backports-modules-3.18.0-9-generic  N/A
   linux-firmware                            1.141
  SourcePackage: linux
  UpgradeStatus: Upgraded to vivid on 2015-01-08 (14 days ago)
  dmi.bios.date: 11/04/2014
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A00
  dmi.board.name: 0144PA
  dmi.board.vendor: Dell Inc.
  dmi.board.version: X04
  dmi.chassis.type: 9
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA00:bd11/04/2014:svnDellInc.:pnXPS139343:pvr01:rvnDellInc.:rn0144PA:rvrX04:cvnDellInc.:ct9:cvr:
  dmi.product.name: XPS 13 9343
  dmi.product.version: 01
  dmi.sys.vendor: Dell Inc.

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