Sound does *not* work for me on testing kernel 5.4.0-42
I'm attaching the dmseg output.


On Mon, Jul 13, 2020 at 12:20 AM Hui Wang <email address hidden>
wrote:

> We also want to fix this issue in the ubuntu 5.4 kernel, so I built a
> testing kernel, could you please test if that testing kernel work or
> not, if it doesn't work, please upload a complete dmesg.
>
> thx.
>
> https://people.canonical.com/~hwang4/lp1886341/
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1886341
>
> Title:
>   Kernel Regression between 5.4.0-26 and 5.4.0-40 causes laptop internal
>   audio devices to fail to load w/o unacceptable workaround (Lenovo
>   IdeaPad 5 15IIL05)
>
> Status in linux package in Ubuntu:
>   Confirmed
>
> Bug description:
>   On Ubuntu 20.04, running kernel 5.4.0-40-generic, the internal
>   speakers, headphone jack, and mic do not work at all. No audio devices
>   appear in the Sound settings or in pavucontrol. By appending options
>   snd_hda_intel dmic_detect=0 to /etc/modprobe.d/alsa-base.conf, I can
>   get audio working, but the microphone (unsuprisingly) does not work.
>   Appending options snd-intel-dspcfg dsp_driver=1 to alsa_base.conf as
>   the same effect as dmic_detect=0. Attempts to fix with option
>   snd_hda_intel device=generic or deveice=auto have had no effect. This
>   bug does NOT manifest on 5.4.0-26-generic, the kernel version featured
>   on the 20.04 live media. After installation, and updating to
>   5.4.0-40-generic, the bug manifests on the next boot.
>
>   Note that the audio hardware seems to work properly w/o workaround on
>   a small (< 5%) percentage of boots, but I have been unable to
>   reproduce this. With the workaround enabled, inxi -A gives
>
>   Audio:
>     Device-1: Intel Smart Sound Audio driver: snd_hda_intel
>     Sound Server: ALSA v: k5.4.0-40-generic
>
>   ProblemType: Bug
>   DistroRelease: Ubuntu 20.04
>   Package: linux-image-5.4.0-40-generic 5.4.0-40.44
>   ProcVersionSignature: Ubuntu 5.4.0-40.44-generic 5.4.44
>   Uname: Linux 5.4.0-40-generic x86_64
>   ApportVersion: 2.20.11-0ubuntu27.3
>   Architecture: amd64
>   AudioDevicesInUse:
>    USER        PID ACCESS COMMAND
>    /dev/snd/controlC0:  jill       1374 F.... pulseaudio
>   CasperMD5CheckResult: skip
>   CurrentDesktop: ubuntu:GNOME
>   Date: Sun Jul  5 13:32:58 2020
>   InstallationDate: Installed on 2020-07-03 (2 days ago)
>   InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64
> (20200423)
>   MachineType: LENOVO 81YK
>   ProcEnviron:
>    TERM=xterm-256color
>    PATH=(custom, no user)
>    XDG_RUNTIME_DIR=<set>
>    LANG=en_US.UTF-8
>    SHELL=/bin/bash
>   ProcFB: 0 i915drmfb
>   ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-40-generic
> root=UUID=dc3e058d-42fc-4de4-b94a-749c1295dc68 ro quiet splash vt.handoff=7
>   RelatedPackageVersions:
>    linux-restricted-modules-5.4.0-40-generic N/A
>    linux-backports-modules-5.4.0-40-generic  N/A
>    linux-firmware                            1.187.1
>   SourcePackage: linux
>   UpgradeStatus: No upgrade log present (probably fresh install)
>   dmi.bios.date: 03/18/2020
>   dmi.bios.vendor: LENOVO
>   dmi.bios.version: DPCN40WW
>   dmi.board.asset.tag: NO Asset Tag
>   dmi.board.name: LNVNB161216
>   dmi.board.vendor: LENOVO
>   dmi.board.version: SDK0J40709 WIN
>   dmi.chassis.asset.tag: NO Asset Tag
>   dmi.chassis.type: 10
>   dmi.chassis.vendor: LENOVO
>   dmi.chassis.version: IdeaPad 5 15IIL05
>   dmi.modalias:
> dmi:bvnLENOVO:bvrDPCN40WW:bd03/18/2020:svnLENOVO:pn81YK:pvrIdeaPad515IIL05:rvnLENOVO:rnLNVNB161216:rvrSDK0J40709WIN:cvnLENOVO:ct10:cvrIdeaPad515IIL05:
>   dmi.product.family: IdeaPad 5 15IIL05
>   dmi.product.name: 81YK
>   dmi.product.sku: LENOVO_MT_81YK_BU_idea_FM_IdeaPad 5 15IIL05
>   dmi.product.version: IdeaPad 5 15IIL05
>   dmi.sys.vendor: LENOVO
>   ---
>   ProblemType: Bug
>   ApportVersion: 2.20.11-0ubuntu27.3
>   Architecture: amd64
>   AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq',
> '/dev/snd/timer'] failed with exit code 1:
>   CasperMD5CheckResult: skip
>   CurrentDesktop: ubuntu:GNOME
>   DistroRelease: Ubuntu 20.04
>   InstallationDate: Installed on 2020-07-03 (5 days ago)
>   InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64
> (20200423)
>   MachineType: LENOVO 81YK
>   Package: linux (not installed)
>   ProcEnviron:
>    TERM=xterm-256color
>    PATH=(custom, no user)
>    XDG_RUNTIME_DIR=<set>
>    LANG=en_US.UTF-8
>    SHELL=/bin/bash
>   ProcFB: 0 i915drmfb
>   ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-40-generic
> root=UUID=dc3e058d-42fc-4de4-b94a-749c1295dc68 ro quiet splash vt.handoff=7
>   ProcVersionSignature: Ubuntu 5.4.0-40.44-generic 5.4.44
>   RelatedPackageVersions:
>    linux-restricted-modules-5.4.0-40-generic N/A
>    linux-backports-modules-5.4.0-40-generic  N/A
>    linux-firmware                            1.187.1
>   Tags:  wayland-session focal
>   Uname: Linux 5.4.0-40-generic x86_64
>   UpgradeStatus: No upgrade log present (probably fresh install)
>   UserGroups: adm cdrom dip lpadmin lxd plugdev sambashare sudo
>   _MarkForUpload: True
>   dmi.bios.date: 03/18/2020
>   dmi.bios.vendor: LENOVO
>   dmi.bios.version: DPCN40WW
>   dmi.board.asset.tag: NO Asset Tag
>   dmi.board.name: LNVNB161216
>   dmi.board.vendor: LENOVO
>   dmi.board.version: SDK0J40709 WIN
>   dmi.chassis.asset.tag: NO Asset Tag
>   dmi.chassis.type: 10
>   dmi.chassis.vendor: LENOVO
>   dmi.chassis.version: IdeaPad 5 15IIL05
>   dmi.modalias:
> dmi:bvnLENOVO:bvrDPCN40WW:bd03/18/2020:svnLENOVO:pn81YK:pvrIdeaPad515IIL05:rvnLENOVO:rnLNVNB161216:rvrSDK0J40709WIN:cvnLENOVO:ct10:cvrIdeaPad515IIL05:
>   dmi.product.family: IdeaPad 5 15IIL05
>   dmi.product.name: 81YK
>   dmi.product.sku: LENOVO_MT_81YK_BU_idea_FM_IdeaPad 5 15IIL05
>   dmi.product.version: IdeaPad 5 15IIL05
>   dmi.sys.vendor: LENOVO
>   ---
>   ProblemType: Bug
>   ApportVersion: 2.20.11-0ubuntu27.3
>   Architecture: amd64
>   AudioDevicesInUse:
>    USER        PID ACCESS COMMAND
>    /dev/snd/controlC0:  jill       1365 F.... pulseaudio
>   CasperMD5CheckResult: skip
>   CurrentDesktop: ubuntu:GNOME
>   DistroRelease: Ubuntu 20.04
>   InstallationDate: Installed on 2020-07-03 (7 days ago)
>   InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64
> (20200423)
>   MachineType: LENOVO 81YK
>   Package: linux (not installed)
>   ProcEnviron:
>    TERM=xterm-256color
>    PATH=(custom, no user)
>    XDG_RUNTIME_DIR=<set>
>    LANG=en_US.UTF-8
>    SHELL=/bin/bash
>   ProcFB: 0 i915drmfb
>   ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.6.0-1018-oem
> root=UUID=dc3e058d-42fc-4de4-b94a-749c1295dc68 ro quiet splash vt.handoff=7
>   ProcVersionSignature: Ubuntu 5.6.0-1018.18-oem 5.6.18
>   RelatedPackageVersions:
>    linux-restricted-modules-5.6.0-1018-oem N/A
>    linux-backports-modules-5.6.0-1018-oem  N/A
>    linux-firmware                          1.187.1
>   Tags:  wayland-session focal
>   Uname: Linux 5.6.0-1018-oem x86_64
>   UpgradeStatus: No upgrade log present (probably fresh install)
>   UserGroups: adm cdrom dip lpadmin lxd plugdev sambashare sudo
>   _MarkForUpload: True
>   dmi.bios.date: 03/18/2020
>   dmi.bios.vendor: LENOVO
>   dmi.bios.version: DPCN40WW
>   dmi.board.asset.tag: NO Asset Tag
>   dmi.board.name: LNVNB161216
>   dmi.board.vendor: LENOVO
>   dmi.board.version: SDK0J40709 WIN
>   dmi.chassis.asset.tag: NO Asset Tag
>   dmi.chassis.type: 10
>   dmi.chassis.vendor: LENOVO
>   dmi.chassis.version: IdeaPad 5 15IIL05
>   dmi.modalias:
> dmi:bvnLENOVO:bvrDPCN40WW:bd03/18/2020:svnLENOVO:pn81YK:pvrIdeaPad515IIL05:rvnLENOVO:rnLNVNB161216:rvrSDK0J40709WIN:cvnLENOVO:ct10:cvrIdeaPad515IIL05:
>   dmi.product.family: IdeaPad 5 15IIL05
>   dmi.product.name: 81YK
>   dmi.product.sku: LENOVO_MT_81YK_BU_idea_FM_IdeaPad 5 15IIL05
>   dmi.product.version: IdeaPad 5 15IIL05
>   dmi.sys.vendor: LENOVO
>   ---
>   ProblemType: Bug
>   ApportVersion: 2.20.11-0ubuntu27.3
>   Architecture: amd64
>   AudioDevicesInUse:
>    USER        PID ACCESS COMMAND
>    /dev/snd/controlC0:  jill       1365 F.... pulseaudio
>   CasperMD5CheckResult: skip
>   CurrentDesktop: ubuntu:GNOME
>   DistroRelease: Ubuntu 20.04
>   InstallationDate: Installed on 2020-07-03 (7 days ago)
>   InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64
> (20200423)
>   MachineType: LENOVO 81YK
>   Package: linux (not installed)
>   ProcEnviron:
>    TERM=xterm-256color
>    PATH=(custom, no user)
>    XDG_RUNTIME_DIR=<set>
>    LANG=en_US.UTF-8
>    SHELL=/bin/bash
>   ProcFB: 0 i915drmfb
>   ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.6.0-1018-oem
> root=UUID=dc3e058d-42fc-4de4-b94a-749c1295dc68 ro quiet splash vt.handoff=7
>   ProcVersionSignature: Ubuntu 5.6.0-1018.18-oem 5.6.18
>   RelatedPackageVersions:
>    linux-restricted-modules-5.6.0-1018-oem N/A
>    linux-backports-modules-5.6.0-1018-oem  N/A
>    linux-firmware                          1.187.1
>   Tags:  wayland-session focal
>   Uname: Linux 5.6.0-1018-oem x86_64
>   UpgradeStatus: No upgrade log present (probably fresh install)
>   UserGroups: adm cdrom dip lpadmin lxd plugdev sambashare sudo
>   _MarkForUpload: True
>   dmi.bios.date: 03/18/2020
>   dmi.bios.vendor: LENOVO
>   dmi.bios.version: DPCN40WW
>   dmi.board.asset.tag: NO Asset Tag
>   dmi.board.name: LNVNB161216
>   dmi.board.vendor: LENOVO
>   dmi.board.version: SDK0J40709 WIN
>   dmi.chassis.asset.tag: NO Asset Tag
>   dmi.chassis.type: 10
>   dmi.chassis.vendor: LENOVO
>   dmi.chassis.version: IdeaPad 5 15IIL05
>   dmi.modalias:
> dmi:bvnLENOVO:bvrDPCN40WW:bd03/18/2020:svnLENOVO:pn81YK:pvrIdeaPad515IIL05:rvnLENOVO:rnLNVNB161216:rvrSDK0J40709WIN:cvnLENOVO:ct10:cvrIdeaPad515IIL05:
>   dmi.product.family: IdeaPad 5 15IIL05
>   dmi.product.name: 81YK
>   dmi.product.sku: LENOVO_MT_81YK_BU_idea_FM_IdeaPad 5 15IIL05
>   dmi.product.version: IdeaPad 5 15IIL05
>   dmi.sys.vendor: LENOVO
>
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>