No audio device after upgrade to Kubuntu 17.10

[travellersam]

After upgrading Kubuntu 17.04 to 17.10, KDE lost the audio device (Realtek sound card on a Lenovo Thinkpad T470s). Volume icon is on mute, with info-popup given: "No output or input devices found". Audio backend is Phonon GStreamer. Re-installing pulseaudio didn't help.

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: pulseaudio 1:10.0-2ubuntu3
ProcVersionSignature: Ubuntu 4.13.0-16.19-generic 4.13.4
Uname: Linux 4.13.0-16-generic x86_64
ApportVersion: 2.20.7-0ubuntu3.1
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: Mon Oct 30 13:58:15 2017
InstallationDate: Installed on 2017-08-25 (66 days ago)
InstallationMedia: Kubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412)
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
SourcePackage: pulseaudio
Symptom: audio
UpgradeStatus: Upgraded to artful on 2017-10-30 (0 days ago)
dmi.bios.date: 04/17/2017
dmi.bios.vendor: LENOVO
dmi.bios.version: N1WET31W (1.10 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20HFCTO1WW
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40700 WIN
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.modalias: dmi:bvnLENOVO:bvrN1WET31W(1.10):bd04/17/2017:svnLENOVO:pn20HFCTO1WW:pvrThinkPadT470s:rvnLENOVO:rn20HFCTO1WW:rvrSDK0J40700WIN:cvnLENOVO:ct10:cvrNone:
dmi.product.family: ThinkPad T470s
dmi.product.name: 20HFCTO1WW
dmi.product.version: ThinkPad T470s
dmi.sys.vendor: LENOVO

[alphablue52 (torsten-doerschel)]

Same problem for me:
after upgrading to 17.10, no more sound devices shown by pulse.
Lenovo Ideapad Z510 with Intel hda soundchip.
Alsainfo attached.

[alphablue52 (torsten-doerschel)]

I just found a fix here:
https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1720519

You have to remove and reinstall alsa-base and pulseaudio.

I figured it out when I tried to start pulseaudio directly, and got this error message:

W: [pulseaudio] module.c: module-combine is deprecated: Please use module-combine-sink instead of module-combine!
W: [pulseaudio] module-combine.c: We will now load module-combine-sink. Please make sure to remove module-combine from your configuration.
E: [pulseaudio] module.c: Module "module-switch-on-connect" should be loaded once at most. Refusing to load.
E: [pulseaudio] main.c: Module load failed.
E: [pulseaudio] main.c: Hintergrunddienst konnte nicht initialisiert werden.

After
sudo apt-get remove --purge alsa-base pulseaudio
sudo apt-get install alsa-base pulseaudio
sudo alsa force-reload

It works again.

[Daniel van Vugt (vanvugt)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug 1720519, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Feel free to continue to report any other bugs you may find.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.