Audio doesn't work on Ubuntu 20.10

[quanxian]

Description:

This happens on almost of Intel client platforms(ICL, TGL, CML, CFL, JSL...). This is a regression issue happen. Ubuntu 20.04 doesn't have this problem.

We ever try legacy audio doesn't work. The only working audio is audio output from Thunderbolt docking.

DP/HDMI audio is under checking

Target Release: 20.10

[quanxian (quanxian-wang)]

@hui, do you have any clue for that?
I suspect it is related with user configuraiton.

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:

apport-collect 1900792

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Hui Wang (hui.wang)]

@quanxian,

Does "Intel client platforms" mean normal PC or Laptops? If possible, please run 'apport-collect 1900792' to collect the log, and I will try to install 20.10.

[quanxian (quanxian-wang)]

we tried latest kernel 5.9-rc8, legacy audio works. dp/hdmi also works.
with 5.8 kernel, legacy doesn't work, it should be a regression.
DP/HDMI are under verification, should work, but need confirmation from our QA.

[quanxian (quanxian-wang)]

client platforms means PC or laptop? yes

[quanxian (quanxian-wang)]

1) originally we use speaker-test to test HDMI/DP/Legacy, failed on Ubuntu 20.10. with 5.9 official kernel, works fine.

2) now we change to another method to test audio, works well.

Summary:
Seems test tools has some issue.
5.9 official kernel support speaker-test, but in 5.8 (ubuntu 20.10), doesn't support speaker-test well.

new method to test audio:

here are our testing step, hope it will give you some hints.

Update
Kernel: 5.8.0-20-generic
Steps:
1. settings-> Sound -> Output Device
2. Click the Test, then click the audio symbol to check the sound.

CML-S/H, ICL-Y/U:
Legacy/DP/HDMI audio PASS

TGL-H:
Legacy/DP audio PASS

CML-U.V2, TGL-Y/U:
No legacy audio device in "aplay -l"

JSL：
Legacy audio PASS. (No graphic driver)

EHL:
aplay: device_list:274: no soundcards found...(No graphic driver)

[Launchpad Janitor (janitor)]

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