Hello Hui Wang, yeah unfortunately i think it's a hardware issue since i
tried windows and fedora but same thing.
For the bluetooth headphone (Redmi buds 4 active) in windows and fedora
works fine, in ubuntu even if I set output a configuration to HSP/HFP
instead of A2DP mic doesn't work, the only way to get it work is to remove
the device from bluetooth settings and set it up again. I recorded a short
video for the issue : https://youtu.be/cZaSqgFJ-Gw


On Sat, Mar 23, 2024 at 1:20 AM Hui Wang <email address hidden> wrote:

> Please upload a complete dmesg with the kernel you updated on 19/03/2024
> (dummy output).
>
> And could you also test the latest upstream mainline kernel or ubuntu
> 24.04 (just put the iso to usb flash drive, boot from it and try ubuntu
> 24.04, no need to install).
>
> https://kernel.ubuntu.com/mainline/v6.8/
>
>
> And also, it looks like a hardware issue to me.
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/2051570
>
> Title:
>   [Vostro 3400, Cirrus Logic CS8409/CS42L42, Speaker, Internal]
>   Underruns, dropouts or crackling sound
>
> Status in alsa-driver package in Ubuntu:
>   New
>
> Bug description:
>   Since the last three weeks' updates, I have encountered several
>   challenges with the audio functionality on my system. Primarily, upon
>   starting my laptop, the audio often fails to work, displaying "Dummy
>   Output." To resolve this, I find myself needing to restart the laptop
>   two or three times before the audio becomes functional.
>
>   Even when the audio is working, I've noticed a recurring issue where,
>   after playing video or audio for approximately 2-3 minutes, the sound
>   starts crackling and buzzing. The intensity of these distortions
>   gradually increases, resembling the static interference on a radio
>   station with a weak signal. This issue persists even when using 3.5mm
>   headphones, requiring the use of a USB headset or Bluetooth headphones
>   to enjoy distortion-free audio.
>
>   Furthermore, I have observed that, regardless of the Ubuntu version
>   (ranging from 22.04 to 22.04.3), I face difficulties changing the
>   microphone output settings when an external audio peripheral, such as
>   a USB headset, 3.5mm headphones, or Bluetooth headphones, is
>   connected. The OS appears to exclusively utilize the microphone from
>   the connected peripheral, making it impossible to switch to the
>   laptop's built-in microphone.
>
>   For your reference, here are the specifications of my laptop and the
>   Ubuntu version I am currently using:
>
>   Laptop: Dell Vostro 3400
>   CPU: 11th Gen Intel i5-1135G7
>   GPU: Intel TigerLake-LP GT2 Iris Xe
>   Memory: 2490MiB / 19720MiB
>   Resolution: 1920x1080
>   OS: Ubuntu 22.04.3 LTS x86_64
>   Kernel: 6.5.0-14-generic
>   DE: GNOME 42.9
>   Shell: bash 5.1.16
>   Sound Card: Card: HDA Intel PCH, Chip: Cirrus Logic CS8409/CS42L42
>
>   **UPDATE 12/02/2024 Noticed that every time my laptop fan starts
> spinning the crackling sound appears, after fan stops the crackling sound
> disappear.
>   **UPDATE 19/03/2024 I did a software update to the linux kernel
> 6.5.0-26, now i get a dummy output in sound even if i restart the system
> many times, and if i use my Bluetooth headphone i can't use the mic,
> neither the mic of the laptop or of the headphone (there is no option is
> the settings to choose from) it's all blank.
>
>   ProblemType: Bug
>   DistroRelease: Ubuntu 22.04
>   Package: alsa-base 1.0.25+dfsg-0ubuntu7
>   ProcVersionSignature: Ubuntu 6.5.0-15.15~22.04.1-generic 6.5.3
>   Uname: Linux 6.5.0-15-generic x86_64
>   ApportVersion: 2.20.11-0ubuntu82.5
>   Architecture: amd64
>   AudioDevicesInUse:
>    USER        PID ACCESS COMMAND
>    /dev/snd/controlC0:  galxy-a10   1437 F.... pulseaudio
>   CasperMD5CheckResult: pass
>   CurrentDesktop: ubuntu:GNOME
>   Date: Mon Jan 29 17:50:44 2024
>   InstallationDate: Installed on 2024-01-16 (13 days ago)
>   InstallationMedia: Ubuntu 22.04.3 LTS "Jammy Jellyfish" - Release amd64
> (20230807.2)
>   PackageArchitecture: all
>   SourcePackage: alsa-driver
>   Symptom: audio
>   Symptom_AlsaPlaybackTest: ALSA playback test through plughw:PCH
> successful
>   Symptom_Card: Built-in Audio - HDA Intel PCH
>   Symptom_Jack: Speaker, Internal
>   Symptom_PulseAudioLog: جانفي 29 17:49:49 galxya10-VR
> whoopsie-upload-all[712]:
> INFO:root:/var/crash/_usr_bin_pulseaudio.1000.crash already marked for
> upload, skipping
>   Symptom_PulsePlaybackTest: PulseAudio playback test successful
>   Symptom_Type: Underruns, dropouts, or "crackling" sound
>   Title: [Vostro 3400, Cirrus Logic CS8409/CS42L42, Speaker, Internal]
> Underruns, dropouts or crackling sound
>   UpgradeStatus: No upgrade log present (probably fresh install)
>   dmi.bios.date: 10/03/2023
>   dmi.bios.release: 1.27
>   dmi.bios.vendor: Dell Inc.
>   dmi.bios.version: 1.27.1
>   dmi.board.name: 0GGCMJ
>   dmi.board.vendor: Dell Inc.
>   dmi.board.version: A02
>   dmi.chassis.type: 10
>   dmi.chassis.vendor: Dell Inc.
>   dmi.modalias:
> dmi:bvnDellInc.:bvr1.27.1:bd10/03/2023:br1.27:svnDellInc.:pnVostro3400:pvr:rvnDellInc.:rn0GGCMJ:rvrA02:cvnDellInc.:ct10:cvr:sku0A23:
>   dmi.product.family: Vostro
>   dmi.product.name: Vostro 3400
>   dmi.product.sku: 0A23
>   dmi.sys.vendor: Dell Inc.
>   mtime.conffile..etc.modprobe.d.alsa-base.conf: 2024-01-28T08:52:28.427855
>
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>
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>