Audio broken on Dell Venue 11 Pro 7140

[GaryParr]

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.

[Brad Figg (brad-figg)]

This change was made by a bot.

[penalvch (penalvch)]

GaryParr, thank you for reporting this and helping make Ubuntu better. You have a slightly different revision (and different connecting hardware) than LP#1413446, so this highly correlates to it.

Hence, given you have the latest BIOS for your model as per Dell's support website, have you contacted Dell and inquired about this from a BIOS perspective?

[GaryParr (gary-garyparr)]

Christopher, I haven't contacted Dell yet for a few reasons. The primary being that I'm not quite sure I understand what to tell them. From what I gather on the most likely related bug (1413446) the original issue was how the BIOS presented the sound card. But... I can't tell from the dmesg results if this is the same thing. It looks similar, but also different.

Also, I know Dell released an A05 BIOS for this model (I'm A04) but then pulled the BIOS after it caused problems. Because of this, and because Dell doesn't officially support Linux on this model, I wanted to have some idea of what to tell/ask them before I raised the issue.

[penalvch (penalvch)]

GaryParr:

>"I know Dell released an A05 BIOS for this model... but then pulled the BIOS after it caused problems."

Would you have further information towards this (ex. support article on Dell's website noting this)?

>"...(I'm A04)..."

Just to advise, as per your Bug Description you are using BIOS A05 (not A04).

Despite this, one thing that could be discussed with Dell as per your dmesg https://launchpadlibrarian.net/208945923/CurrentDmesg.txt :
[ 0.076672] Your BIOS is broken and requested that x2apic be disabled.
This will slightly decrease performance.
Use 'intremap=no_x2apic_optout' to override BIOS request.

Hence, at a minimum they either should provide an updated BIOS that fixes at least this issue, or if this was the problem introduced in A05, they should provide A04 via their website.

[GaryParr (gary-garyparr)]

Ah, it seems I miss-read the BIOS issue that was going on with this model and then made a faulty assumption. Apparently the problem was not the A05 version in particular, but the flashing process in general. See http://en.community.dell.com/support-forums/mobile-devices/f/4586/t/19631600?pi239031352=1

[GaryParr (gary-garyparr)]

Just an update, I've installed the latest BIOS and still have this problem.

[Mario Limonciello (superm1)]

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.

[ksv (reachksv)]

This worked on 4.2rc5, Thanks Mario

[Tudor Holton (tudor)]

It's not quite that simple. https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1464757 points out that you still have to unmute the "SPO" channel in alsamixer to actually get sound.

[RussianNeuroMancer (russianneuromancer)]

Audio is working with Linux 4.4, but broken with 4.5rc1 and newer kernels: https://bugzilla.kernel.org/show_bug.cgi?id=150591
There is patch for cobmojack detection, should work with 4.4 but I didn't check: https://bugzilla.kernel.org/show_bug.cgi?id=150601 If anyone build kernel package (with 4.4) that include this patch, I would test it.

[RussianNeuroMancer (russianneuromancer)]

Audio is working again since Linux 4.8.

[RussianNeuroMancer (russianneuromancer)]

Closing as kernel with fix was shipped long time ago.