Problem still continues after upgrade to 5.8.0-38-generic #43-Ubuntu SMP
Tue Jan 12 12:42:13 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux

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https://bugs.launchpad.net/bugs/1902457

Title:
  regression: no sound cards detected on lenovo yoga c930 after
  focal->groovy upgrade

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  After upgrading to Groovy, my sound cards no longer work. Alsa-info says "no 
soundcards detected"
  --- 
  ProblemType: Bug
  ApportVersion: 2.20.11-0ubuntu50
  Architecture: amd64
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', 
'/dev/snd/timer'] failed with exit code 1:
  CasperMD5CheckResult: skip
  CurrentDesktop: XFCE
  DistroRelease: Ubuntu 20.10
  InstallationDate: Installed on 2019-07-25 (465 days ago)
  InstallationMedia: Xubuntu 19.04 "Disco Dingo" - Release amd64 (20190416)
  Lsusb:
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 007: ID 8087:0025 Intel Corp. Wireless-AC 9260 Bluetooth 
Adapter
   Bus 001 Device 006: ID 06cb:0081 Synaptics, Inc. 
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  Lsusb-t:
   /:  Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/6p, 5000M
   /:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/12p, 480M
       |__ Port 5: Dev 6, If 0, Class=Vendor Specific Class, Driver=, 12M
       |__ Port 8: Dev 7, If 1, Class=Wireless, Driver=btusb, 12M
       |__ Port 8: Dev 7, If 0, Class=Wireless, Driver=btusb, 12M
  MachineType: LENOVO 81C4
  Package: linux (not installed)
  ProcFB: 0 i915drmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.8.0-26-generic 
root=/dev/mapper/xubuntu--c930-root ro quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 5.8.0-26.27-generic 5.8.14
  RelatedPackageVersions:
   linux-restricted-modules-5.8.0-26-generic N/A
   linux-backports-modules-5.8.0-26-generic  N/A
   linux-firmware                            1.190
  Tags:  groovy
  Uname: Linux 5.8.0-26-generic x86_64
  UnreportableReason: This report is about a package that is not installed.
  UpgradeStatus: Upgraded to groovy on 2020-10-30 (2 days ago)
  UserGroups: adm cdrom dialout dip i2c input lpadmin plugdev sambashare sudo 
video
  _MarkForUpload: False
  dmi.bios.date: 10/09/2018
  dmi.bios.release: 1.32
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 8GCN32WW
  dmi.board.asset.tag: NO Asset Tag
  dmi.board.name: LNVNB161216
  dmi.board.vendor: LENOVO
  dmi.board.version: SDK0R32862 WIN
  dmi.chassis.asset.tag: NO Asset Tag
  dmi.chassis.type: 31
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Lenovo YOGA C930-13IKB
  dmi.ec.firmware.release: 1.32
  dmi.modalias: 
dmi:bvnLENOVO:bvr8GCN32WW:bd10/09/2018:br1.32:efr1.32:svnLENOVO:pn81C4:pvrLenovoYOGAC930-13IKB:rvnLENOVO:rnLNVNB161216:rvrSDK0R32862WIN:cvnLENOVO:ct31:cvrLenovoYOGAC930-13IKB:
  dmi.product.family: YOGA C930-13IKB
  dmi.product.name: 81C4
  dmi.product.sku: LENOVO_MT_81C4_BU_idea_FM_YOGA C930-13IKB
  dmi.product.version: Lenovo YOGA C930-13IKB
  dmi.sys.vendor: LENOVO
  --- 
  ProblemType: Bug
  ApportVersion: 2.20.11-0ubuntu50.1
  Architecture: amd64
  CasperMD5CheckResult: skip
  CurrentDesktop: XFCE
  DistroRelease: Ubuntu 20.10
  InstallationDate: Installed on 2019-07-25 (487 days ago)
  InstallationMedia: Xubuntu 19.04 "Disco Dingo" - Release amd64 (20190416)
  Package: linux (not installed)
  Tags:  groovy
  Uname: Linux 5.10.0-051000rc5-generic x86_64
  UnreportableReason: The running kernel is not an Ubuntu kernel
  UpgradeStatus: Upgraded to groovy on 2020-10-30 (24 days ago)
  UserGroups: adm cdrom dialout dip i2c input lpadmin plugdev sambashare sudo 
video
  _MarkForUpload: True
  --- 
  ProblemType: Bug
  ApportVersion: 2.20.11-0ubuntu50.2
  Architecture: amd64
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', 
'/dev/snd/timer'] failed with exit code 1:
  CasperMD5CheckResult: skip
  CurrentDesktop: XFCE
  DistroRelease: Ubuntu 20.10
  InstallationDate: Installed on 2019-07-25 (496 days ago)
  InstallationMedia: Xubuntu 19.04 "Disco Dingo" - Release amd64 (20190416)
  Lsusb:
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 008: ID 8087:0025 Intel Corp. Wireless-AC 9260 Bluetooth 
Adapter
   Bus 001 Device 007: ID 10c4:ea60 Silicon Labs CP210x UART Bridge
   Bus 001 Device 006: ID 06cb:0081 Synaptics, Inc. 
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: LENOVO 81C4
  Package: linux (not installed)
  ProcFB: 0 i915drmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.8.0-31-generic 
root=/dev/mapper/xubuntu--c930-root ro quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 5.8.0-31.33-generic 5.8.17
  RelatedPackageVersions:
   linux-restricted-modules-5.8.0-31-generic N/A
   linux-backports-modules-5.8.0-31-generic  N/A
   linux-firmware                            1.190.1
  Tags:  groovy
  Uname: Linux 5.8.0-31-generic x86_64
  UpgradeStatus: Upgraded to groovy on 2020-10-30 (33 days ago)
  UserGroups: adm cdrom dialout dip i2c input lpadmin plugdev sambashare sudo 
video
  _MarkForUpload: True
  dmi.bios.date: 10/09/2018
  dmi.bios.release: 1.32
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 8GCN32WW
  dmi.board.asset.tag: NO Asset Tag
  dmi.board.name: LNVNB161216
  dmi.board.vendor: LENOVO
  dmi.board.version: SDK0R32862 WIN
  dmi.chassis.asset.tag: NO Asset Tag
  dmi.chassis.type: 31
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Lenovo YOGA C930-13IKB
  dmi.ec.firmware.release: 1.32
  dmi.modalias: 
dmi:bvnLENOVO:bvr8GCN32WW:bd10/09/2018:br1.32:efr1.32:svnLENOVO:pn81C4:pvrLenovoYOGAC930-13IKB:rvnLENOVO:rnLNVNB161216:rvrSDK0R32862WIN:cvnLENOVO:ct31:cvrLenovoYOGAC930-13IKB:
  dmi.product.family: YOGA C930-13IKB
  dmi.product.name: 81C4
  dmi.product.sku: LENOVO_MT_81C4_BU_idea_FM_YOGA C930-13IKB
  dmi.product.version: Lenovo YOGA C930-13IKB
  dmi.sys.vendor: LENOVO

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