laptop sound broken in latest update -- "No output or input devices found"

[craigster0]

after i installed the latest update for Kubuntu 17.10 my audio devices disappeared and i lost the ability to listen to music or play sounds on my laptop. it worked fine before the update!

(Caveat: sometimes ads or youtube will play through the speakers or headphones but it is unpredictable and i have no control over volume or muting.)

the Plasma Audio Volume settings show "No Output Devices Available" and "No Input Devices Available". it worked fine before the last update.

this is a Lenovo P51, a fairly popular laptop for linux. my laptop is a high end version with an E3-1505M CPU and "hybrid graphics".

i do not update the software every day so the problem may have been introduced upto two weeks ago, but no earlier then that.

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: linux-image-4.13.0-37-generic 4.13.0-37.42
ProcVersionSignature: Ubuntu 4.13.0-37.42-generic 4.13.13
Uname: Linux 4.13.0-37-generic x86_64
ApportVersion: 2.20.7-0ubuntu3.7
Architecture: amd64
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/hwC0D2', '/dev/snd/hwC0D0', '/dev/snd/pcmC0D10p', '/dev/snd/pcmC0D9p', '/dev/snd/pcmC0D8p', '/dev/snd/pcmC0D7p', '/dev/snd/pcmC0D3p', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/controlC0', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
CurrentDesktop: KDE
Date: Tue Apr 3 21:38:36 2018
HibernationDevice: RESUME=UUID=1c6e24a0-ad92-4e31-bad8-91d3ac06ee02
InstallationDate: Installed on 2018-01-12 (81 days ago)
InstallationMedia: Kubuntu 17.10 "Artful Aardvark" - Release amd64 (20171017.1)
MachineType: LENOVO 20HHCTO1WW
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.13.0-37-generic.efi.signed root=/dev/mapper/p51vg-root ro quiet splash vt.handoff=7
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
 linux-restricted-modules-4.13.0-37-generic N/A
 linux-backports-modules-4.13.0-37-generic N/A
 linux-firmware 1.169.3
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 02/13/2017
dmi.bios.vendor: LENOVO
dmi.bios.version: N1UET31W (1.05 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20HHCTO1WW
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40697 WIN
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.modalias: dmi:bvnLENOVO:bvrN1UET31W(1.05):bd02/13/2017:svnLENOVO:pn20HHCTO1WW:pvrThinkPadP51:rvnLENOVO:rn20HHCTO1WW:rvrSDK0J40697WIN:cvnLENOVO:ct10:cvrNone:
dmi.product.family: ThinkPad P51
dmi.product.name: 20HHCTO1WW
dmi.product.version: ThinkPad P51
dmi.sys.vendor: LENOVO

[craigster0 (charmer-launchpad-net)]

i'm wondering whether i should try rolling back to the previous kernel version. (i didn't notice any updates to sound drivers or software when i reviewed the packages to be upgraded, but i may have missed something.)

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This change was made by a bot.

[Joseph Salisbury (jsalisbury)]

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.16 kernel[0].

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.16

[craigster0 (charmer-launchpad-net)]

Yes, i should be able to test with the v4.16 kernel. I'll try to do that tonight.

I'm sorry I didn't see your note earlier!

[craigster0 (charmer-launchpad-net)]

OK, i'm now running the V4.16.0 kernel:

> craigster0@p51:/local/home/craigster0/Downloads/linux-kernel-4.16$ uname -r
> 4.16.0-041600-generic

and clicking on the "speaker icon" on the menu bar at the bottom of the screen still shows "No output or input devices found". more importantly, trying to play audio with Amarok or Rhythmbox produces no audible signal.

to the best of my recollection. i don't think this problem was _caused_ by a kernel update. both speakers and microphone worked fine with all apps before i performed a software update, and failed after that. the trick is figuring out exactly which software update caused the problem!

[craigster0 (charmer-launchpad-net)]

OK, i'm now running the V4.16.0 kernel:

> craigster0@p51:/local/home/craigster0/Downloads/linux-kernel-4.16$ uname -r
> 4.16.0-041600-generic

and clicking on the "speaker icon" on the menu bar at the bottom of the screen still shows "No output or input devices found". more importantly, trying to play audio with Amarok or Rhythmbox produces no audible signal.

i also tried booting with the oldest kernel still installed on the box, vmlinuz-4.13.0-36-generic, which was installed well before this problem occurred and the sound still didn't work.

to the best of my recollection. i don't think this problem was _caused_ by a kernel update. both speakers and microphone worked fine with all apps before i performed a software update, and failed after that. the trick is figuring out exactly which software update caused the problem!

[craigster0 (charmer-launchpad-net)]

Sound is not completely broken: With chromium-browser i can watch videos with sound on youtube.com, and on slack.com both speaker and microphone work.

But using Firefox with the same web sites does not have any sound.

The music players Amarok and Rhythmbox also do not produce sound, which makes me sad. I have not found one that works.

Any suggestions as to where to start if i want to try and fix this myself?

[Launchpad Janitor (janitor)]

[Expired for linux (Ubuntu Artful) because there has been no activity for 60 days.]

[Launchpad Janitor (janitor)]

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]