kernel-packages team mailing list archive

[Mario Limonciello <superm1@xxxxxxxxxx>]

To check if the symptoms are actually identical to bug 1413446, there are a few ways to go about it debugging further.  

The easiest thing you can do is to grab kernel 4.2 (rc5 or later) which includes this commit:
https://github.com/torvalds/linux/commit/ea7d521569a70418aa9f6309a1d1916709818b62

That avoids the behavior of the things changed by this _REV check.
You'll probably need to cold boot a few times and might need to mess
with mixers to get audio working after this.

If that doesn't work properly then that likely means that there are
other audio problems that need to debugged and it's not a BIOS issue or
not only a BIOS issue.

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https://bugs.launchpad.net/bugs/1464757

Title:
  Audio broken on Dell Venue 11 Pro 7140

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  Appears related to the following

  https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1413446
  https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1441852
  https://bugzilla.redhat.com/show_bug.cgi?id=1194616

  ubuntu-gnome@ubuntu-gnome:~$ 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)
  sst-acpi INT3438:00: DesignWare DMA Controller, 8 channels
  haswell-pcm-audio haswell-pcm-audio: FW loaded, mailbox readback FW info: type 01, - version: 00.00, build 77, source commit id: 876ac6906f31a43b6772b23c7c983ce9dcb18a19
  broadwell-audio broadwell-audio: ASoC: CODEC DAI rt286-aif1 not registered
  platform broadwell-audio: Driver broadwell-audio requests probe deferral

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: linux-image-3.19.0-15-generic 3.19.0-15.15
  ProcVersionSignature: Ubuntu 3.19.0-15.15-generic 3.19.3
  Uname: Linux 3.19.0-15-generic x86_64
  ApportVersion: 2.17.2-0ubuntu1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  ubuntu-gnome   2440 F.... pulseaudio
  CasperVersion: 1.360
  CurrentDesktop: GNOME
  Date: Fri Jun 12 19:33:45 2015
  LiveMediaBuild: Ubuntu-GNOME 15.04 "Vivid Vervet" - Release amd64 (20150422)
  MachineType: Dell Inc. Venue 11 Pro 7140
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi file=/cdrom/preseed/username.seed boot=casper quiet splash ---
  RelatedPackageVersions:
   linux-restricted-modules-3.19.0-15-generic N/A
   linux-backports-modules-3.19.0-15-generic  N/A
   linux-firmware                             1.143
  SourcePackage: linux
  UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 04/15/2015
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A05
  dmi.board.name: 0XMVMH
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA05:bd04/15/2015:svnDellInc.:pnVenue11Pro7140:pvr01:rvnDellInc.:rn0XMVMH:rvrA00:cvnDellInc.:ct8:cvr:
  dmi.product.name: Venue 11 Pro 7140
  dmi.product.version: 01
  dmi.sys.vendor: Dell Inc.

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