I recently upgraded from 18.04 to 20.04. The sound worked without problems before upgrade, but now I don'get any sound at all from the speakers or the headphone jack.
This seems similar to https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1860697 (although that bug is reported as resolved). I tried adding model=generic dmic_detect=0 to my alsa-base.conf, as reported in that ticket, but it did not help.
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: pulseaudio 1:13.99.1-1ubuntu3.8
ProcVersionSignature: Ubuntu 5.4.0-54.60-generic 5.4.65
Uname: Linux 5.4.0-54-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.13
Architecture: amd64
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/controlC0', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
CasperMD5CheckResult: skip
CurrentDesktop: XFCE
Date: Sat Nov 28 18:36:36 2020
InstallationDate: Installed on 2018-07-27 (855 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
SourcePackage: pulseaudio
UpgradeStatus: Upgraded to focal on 2020-11-24 (4 days ago)
dmi.bios.date: 10/13/2020
dmi.bios.vendor: LENOVO
dmi.bios.version: N23ET75W (1.50 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20KGCTO1WW
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40709 WIN
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.modalias: dmi:bvnLENOVO:bvrN23ET75W(1.50):bd10/13/2020:svnLENOVO:pn20KGCTO1WW:pvrThinkPadX1Carbon6th:rvnLENOVO:rn20KGCTO1WW:rvrSDK0J40709WIN:cvnLENOVO:ct10:cvrNone:
dmi.product.family: ThinkPad X1 Carbon 6th
dmi.product.name: 20KGCTO1WW
dmi.product.sku: LENOVO_MT_20KG_BU_Think_FM_ThinkPad X1 Carbon 6th
dmi.product.version: ThinkPad X1 Carbon 6th
dmi.sys.vendor: LENOVO
---
ProblemType: Bug
ApportVersion: 2.20.11-0ubuntu27.13
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: misha 2223 F.... pulseaudio
/dev/snd/pcmC0D0p: misha 2223 F...m pulseaudio
CasperMD5CheckResult: skip
CurrentDesktop: XFCE
DistroRelease: Ubuntu 20.04
HibernationDevice: resume=UUID=85cedc6b-f3ef-4152-a471-35fa0ee621a1
InstallationDate: Installed on 2018-07-27 (859 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
MachineType: LENOVO 20KGCTO1WW
Package: linux (not installed)
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-54-generic root=UUID=7d9c3e7d-d2d0-45a2-a598-2ee37d17a0fa ro resume=UUID=85cedc6b-f3ef-4152-a471-35fa0ee621a1 quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 5.4.0-54.60-generic 5.4.65
RelatedPackageVersions:
linux-restricted-modules-5.4.0-54-generic N/A
linux-backports-modules-5.4.0-54-generic N/A
linux-firmware 1.187.4
Tags: focal
Uname: Linux 5.4.0-54-generic x86_64
UpgradeStatus: Upgraded to focal on 2020-11-24 (7 days ago)
UserGroups: adm audio cdrom dip docker lpadmin plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 10/13/2020
dmi.bios.vendor: LENOVO
dmi.bios.version: N23ET75W (1.50 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20KGCTO1WW
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40709 WIN
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.modalias: dmi:bvnLENOVO:bvrN23ET75W(1.50):bd10/13/2020:svnLENOVO:pn20KGCTO1WW:pvrThinkPadX1Carbon6th:rvnLENOVO:rn20KGCTO1WW:rvrSDK0J40709WIN:cvnLENOVO:ct10:cvrNone:
dmi.product.family: ThinkPad X1 Carbon 6th
dmi.product.name: 20KGCTO1WW
dmi.product.sku: LENOVO_MT_20KG_BU_Think_FM_ThinkPad X1 Carbon 6th
dmi.product.version: ThinkPad X1 Carbon 6th
dmi.sys.vendor: LENOVO
This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:
apport-collect 1906101
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the Ubuntu Kernel Team.