Bug 1909476 - Multi channel sound issues over HDMI
Summary: Multi channel sound issues over HDMI
Alias: None
Product: Fedora
Classification: Fedora
Component: pulseaudio
Version: 33
Hardware: x86_64
OS: Linux
Target Milestone: ---
Assignee: Lennart Poettering
QA Contact: Fedora Extras Quality Assurance
Depends On:
TreeView+ depends on / blocked
Reported: 2020-12-20 09:47 UTC by Daniel Rowe
Modified: 2021-11-30 17:38 UTC (History)
6 users (show)

Fixed In Version:
Doc Type: ---
Doc Text:
Clone Of:
Last Closed: 2021-11-30 17:38:48 UTC
Type: Bug

Attachments (Terms of Use)
alsa-info.sh --no-upload (41.26 KB, text/plain)
2020-12-20 09:48 UTC, Daniel Rowe
no flags Details
Screen shot of settings app (15.73 KB, image/png)
2020-12-20 09:50 UTC, Daniel Rowe
no flags Details

Description Daniel Rowe 2020-12-20 09:47:42 UTC
Description of problem:

With Fedora 33 I am having sound issues. No issues under 32, or any previous version of Fedora.

I have a intel NUC attached to a Denon amp via HDMI, outputting multichannel 7.1 audio.

If I pause anything outputting sound like a movie for example, it stops working, no sound. If I open setting and toggle the Configuration to any setting and back the sounds starts to work again. For example if is toggle from 5.1 to 7.1 and then unpause the media it works again. Turning the Denon amp off and back on also results in sound working.

There seem to be others having this issue, I opened this thread: https://ask.fedoraproject.org/t/fedora-multi-channel-sound-issues-with-fedora-33/10652

Seems not to be related to the app playing the media as the same issues happens with Smplayer and Celluloid. 

If I remove the alsa-plugins-pulseaudio package as stated in the How to debug sound problems wiki page and reboot the problem goes away. I am still outputting via pulseaudio as I have the pulseaudio device selected.

Version-Release number of selected component (if applicable):

[root@mediabox ~]# rpm -qa | grep pulseaudio

How reproducible:


Steps to Reproduce:
1. Play a movie
2. Pause movie
3. Unpause

Actual results:

No sound.

Expected results:

Sound works.

Additional info:

I booted this device back to Fedora 32 and I could not get it to break. As soon as I went back to F33 problem is present.

As stated above removing the alsa-plugins-pulseaudio package seems to fix it, even if I am still outputting via pulseaudio. I need to test for a longer period to see if it is really fixed. Will report back.

I have opened another sound related bug which is only present on Fedora 33: 1909473

Comment 1 Daniel Rowe 2020-12-20 09:48:23 UTC
Created attachment 1740612 [details]
alsa-info.sh --no-upload

Comment 2 Daniel Rowe 2020-12-20 09:50:11 UTC
Created attachment 1740613 [details]
Screen shot of settings app

Comment 3 Daniel Rowe 2020-12-20 10:09:04 UTC
pulseaudio -k also fixes sound until it is paused again.

Comment 4 Daniel Rowe 2021-01-08 03:14:33 UTC
I have done some more testing and:

On Kernel 5.8 no issues/problems. On kernel 5.9 or 5.10 the issue is present.

This seem to be kernel issue on any version > 5.8.

Comment 5 Ben Cotton 2021-11-04 16:22:02 UTC
This message is a reminder that Fedora 33 is nearing its end of life.
Fedora will stop maintaining and issuing updates for Fedora 33 on 2021-11-30.
It is Fedora's policy to close all bug reports from releases that are no longer
maintained. At that time this bug will be closed as EOL if it remains open with a
Fedora 'version' of '33'.

Package Maintainer: If you wish for this bug to remain open because you
plan to fix it in a currently maintained version, simply change the 'version' 
to a later Fedora version.

Thank you for reporting this issue and we are sorry that we were not 
able to fix it before Fedora 33 is end of life. If you would still like 
to see this bug fixed and are able to reproduce it against a later version 
of Fedora, you are encouraged  change the 'version' to a later Fedora 
version prior this bug is closed as described in the policy above.

Although we aim to fix as many bugs as possible during every release's 
lifetime, sometimes those efforts are overtaken by events. Often a 
more recent Fedora release includes newer upstream software that fixes 
bugs or makes them obsolete.

Comment 6 Ben Cotton 2021-11-30 17:38:48 UTC
Fedora 33 changed to end-of-life (EOL) status on 2021-11-30. Fedora 33 is
no longer maintained, which means that it will not receive any further
security or bug fix updates. As a result we are closing this bug.

If you can reproduce this bug against a currently maintained version of
Fedora please feel free to reopen this bug against that version. If you
are unable to reopen this bug, please file a new report against the
current release. If you experience problems, please add a comment to this

Thank you for reporting this bug and we are sorry it could not be fixed.

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