No Audio MacBookPro14,1

[b24bomber]

Hi

I am a new comer to Mint . I have spent years on Fedora and RH products , only familiar with Debian based systems from a distant.

I installed M 21.2 on a Macpro41 , 2021 model. It came with 5.15 kernel.

I updated kernel 6.5.0-25-generic #25~22.04.1 after seeing a online posting that would cure my "DUMMY OUTPUT " status of my audio device.

Code: Select all

# journalctl -k | grep -Ei "ALSA|HDA|sof[-]|HDMI|snd[_-]|sound|hda.codec|hda.intel"
Mar 14 18:56:07 warbaby kernel: snd_hda_intel 0000:00:1f.3: bound 0000:00:02.0 (ops i915_audio_component_bind_ops [i915])
Mar 14 18:56:07 warbaby kernel: snd_hda_codec_cs8409 hdaudioC0D0: autoconfig for CS8409: line_outs=2 (0x24/0x25/0x0/0x0/0x0) type:speaker
Mar 14 18:56:07 warbaby kernel: snd_hda_codec_cs8409 hdaudioC0D0:    speaker_outs=0 (0x0/0x0/0x0/0x0/0x0)
Mar 14 18:56:07 warbaby kernel: snd_hda_codec_cs8409 hdaudioC0D0:    hp_outs=1 (0x2c/0x0/0x0/0x0/0x0)
Mar 14 18:56:07 warbaby kernel: snd_hda_codec_cs8409 hdaudioC0D0:    mono: mono_out=0x0
Mar 14 18:56:07 warbaby kernel: snd_hda_codec_cs8409 hdaudioC0D0:    inputs:
Mar 14 18:56:07 warbaby kernel: snd_hda_codec_cs8409 hdaudioC0D0:      Internal Mic=0x44
Mar 14 18:56:07 warbaby kernel: snd_hda_codec_cs8409 hdaudioC0D0:      Mic=0x3c
Mar 14 18:56:07 warbaby kernel: input: HDA Intel PCH HDMI/DP,pcm=3 as /devices/pci0000:00/0000:00:1f.3/sound/card0/input7
Mar 14 18:56:07 warbaby kernel: input: HDA Intel PCH HDMI/DP,pcm=7 as /devices/pci0000:00/0000:00:1f.3/sound/card0/input8
Mar 14 18:56:07 warbaby kernel: input: HDA Intel PCH HDMI/DP,pcm=8 as /devices/pci0000:00/0000:00:1f.3/sound/card0/input9

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# play -l
**** List of PLAYBACK Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 3: HDMI 0 [HDMI 0]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 7: HDMI 1 [HDMI 1]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 8: HDMI 2 [HDMI 2]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
 

---

There are some online references to "audio" problems on a Mac-pro .. none address a solution.

This looks to me like a kernel problem since the device is being labeled a "DUMMY OUTPUT "

Please help me .

Thanks

JD

[diabolicbg]

Please go to System Report - System Information, click the Copy button and paste it here to see how LM sees your hardware!

[b24bomber]

Fix found


https://github.com/davidjo/snd_hda_macbookpro


Why this isn't included in 6.5 kernel is anyone's guess

[b24bomber]

Fixed by asking for help in IRC

thanks

[SMG]

Fix found
https://github.com/davidjo/snd_hda_macbookpro

Why this isn't included in 6.5 kernel is anyone's guess

Random solutions posted on GitHub are not usually included in the kernel. Not sure why you would think they would be. There are a lot of quality checks and maintenance required to have code included in the kernel.

Fixed by asking for help in IRC

That solution is listed in Tips for Troubleshooting Sound Issues Rev. 1 which is a sticky topic on this Sound forum in section Apple computers with CS8409 sound cards.

If your issue is resolved, please go to your first post in this topic, click the pencil icon, and add [SOLVED] to the beginning of the title and submit the revised post so others know you are no longer seeking help on this issue.

[b24bomber]

To whomever you are.

This is " not a random solution "

It should be added to the distribution . It is called a " defect " . Fix it.

I am a retired kernel developer from IBM and Oracle . I know the procedure.

Being you are a Linux distributor you should certainly take this topic seriously and take a proactive step in fixing your product for the enjoyment of others. If that is an inconvenience , perhaps you should consider another profession.

I was told in IRC that as a user without support contract, I can't enter a defect or request a change like this..

Instead of a snark response ..Enter a defect and fix it.

Thank you .
And have a nice day.

[SMG]

Being you are a Linux distributor you should certainly take this topic seriously and take a proactive step in fixing your product for the enjoyment of others. If that is an inconvenience , perhaps you should consider another profession.

This is a user forum where users volunteer their time to help other users. No one here is being paid for their work in helping others so this is not anyone's "profession".

I was told in IRC that as a user without support contract, I can't enter a defect or request a change like this..

I have no idea what you were told in IRC and as far as I am aware, you most certainly can enter a defect or change. In fact if you are a retired kernel developer then you probably know the process better than most everyone here.