Hello Hui, please explain how I install this kernel. I am having trouble with 
that.
> On Jul 14, 2021, at 5:50 AM, Hui Wang <1918...@bugs.launchpad.net> wrote:
> 
> Please test this kernel: https://people.canonical.com/~hwang4/lp1918458/
> 
> -- 
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1918458
> 
> Title:
>  [Swift SF515-51T, Realtek ALC256, Grey Speaker, Internal] Playback
>  problem, no sound from speakers, headphones ok
> 
> Status in alsa-driver package in Ubuntu:
>  Confirmed
> 
> Bug description:
>  Expect : sound from speaker
>  Instead, obtain : no sound.
> 
> 
>  Tried various configuration of /etc/modprobe.d/alsa-conf with :
> 
>  options snd-hda-intel model=XXXX and
>  options snd-intel-dspcfg dsp_driver=3 or 1
>  and systematic reboot.
> 
>  Either I get dummy output, or I get proper output detection, alsamixer
>  and pavucontrol seems 100% ok, but no sound comes from the speakers.
> 
>  I'm under a dualboot with Windows 10, BIOS fast boot disabled.
>  Ubuntu 20.04.2 LTS
> 
>  ProblemType: Bug
>  DistroRelease: Ubuntu 20.04
>  Package: alsa-base 1.0.25+dfsg-0ubuntu5
>  ProcVersionSignature: Ubuntu 5.8.0-44.50~20.04.1-generic 5.8.18
>  Uname: Linux 5.8.0-44-generic x86_64
>  ApportVersion: 2.20.11-0ubuntu27.16
>  Architecture: amd64
>  AudioDevicesInUse:
>   USER        PID ACCESS COMMAND
>   /dev/snd/controlC0:  thibauts   1522 F.... pulseaudio
>   /dev/snd/pcmC0D0p:   thibauts   1522 F...m pulseaudio
>  CasperMD5CheckResult: skip
>  CurrentDesktop: ubuntu:GNOME
>  Date: Wed Mar 10 18:10:30 2021
>  InstallationDate: Installed on 2021-03-09 (1 days ago)
>  InstallationMedia: Ubuntu 20.04.2.0 LTS "Focal Fossa" - Release amd64 
> (20210209.1)
>  PackageArchitecture: all
>  SourcePackage: alsa-driver
>  Symptom: audio
>  Symptom_AlsaPlaybackTest: ALSA playback test through plughw:sofhdadsp failed
>  Symptom_Card: Cannon Point-LP High Definition Audio Controller - sof-hda-dsp
>  Symptom_Jack: Grey Speaker, Internal
>  Symptom_Type: Only some of outputs are working
>  Title: [Swift SF515-51T, Realtek ALC256, Grey Speaker, Internal] Playback 
> problem
>  UpgradeStatus: No upgrade log present (probably fresh install)
>  dmi.bios.date: 05/24/2019
>  dmi.bios.release: 1.4
>  dmi.bios.vendor: American Megatrends Inc.
>  dmi.bios.version: V1.04
>  dmi.board.asset.tag: Default string
>  dmi.board.name: Guinness_WL
>  dmi.board.vendor: WL
>  dmi.board.version: V1.04
>  dmi.chassis.type: 10
>  dmi.chassis.vendor: Acer
>  dmi.chassis.version: V1.04
>  dmi.ec.firmware.release: 1.6
>  dmi.modalias: 
> dmi:bvnAmericanMegatrendsInc.:bvrV1.04:bd05/24/2019:br1.4:efr1.6:svnAcer:pnSwiftSF515-51T:pvrV1.04:rvnWL:rnGuinness_WL:rvrV1.04:cvnAcer:ct10:cvrV1.04:
>  dmi.product.family: Swift 5
>  dmi.product.name: Swift SF515-51T
>  dmi.product.sku: 0000000000000000
>  dmi.product.version: V1.04
>  dmi.sys.vendor: Acer
>  mtime.conffile..etc.modprobe.d.alsa-base.conf: 2021-03-10T18:04:19.277254
> 
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1918458/+subscriptions
>

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https://bugs.launchpad.net/bugs/1918458

Title:
  [Swift SF515-51T, Realtek ALC256, Grey Speaker, Internal] Playback
  problem, no sound from speakers, headphones ok

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1918458/+subscriptions


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