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Re: No sound on laptop after linux-libre 5.15

From: Thiago Jung Bauermann
Subject: Re: No sound on laptop after linux-libre 5.15
Date: Sat, 05 Feb 2022 03:32:00 -0300

Hello Paxton,

Paxton Evans <> writes:

> On 2021-12-08 23:05, Leo Famulari wrote:
>> On Wed, Dec 08, 2021 at 11:34:24PM -0300, Thiago Jung Bauermann wrote:
>>> Em quarta-feira, 8 de dezembro de 2021, às 01:55:13 -03, Paxton Evans
>>> escreveu:
>>> > Rolling back to linux-libre 5.14.21 (guix
>>> > ea7233befb9570cce47e5ca71725b285a580cd22) totally fixes this issue.
>>> >
>>> > Troubleshooting sound issues on GNU/Linux is such a nightmare that I'm
>>> > hoping this list can help me, as I don't really know much about how
>>> > sound on our favorite OS really works, and don't have enough information
>>> > to file a bug. Can anyone give me pointers on where to start looking?
>>> > dmesg on 5.15.6 didn't seem to report anything strange.
>> Thanks for your report. Everything Thiago said is important, and it
>> would also help if you told us what you had tried to do. That is, what
>> are you using to make sound?
>> My basic sound test is to use mpg123 to play an MP3 file. You can use
>> the --output option to choose which output to play through, to be sure.
>> And you can use --list-modules to see what's available.
>> On Guix System, we aim to make applications use Pulseaudio by default,
>> so you can use `mpg123 --output pulse file.mp3` to test that. You can
>> also use `mpg123 --output alsa file.mp3` if you'd rather test ALSA.
>> Unfortunately I currently cannot test sound on Guix System with
>> linux-libre. However, it does work for me on a computer using Guix
>> System with a custom kernel.
> In case anyone finds this later, I wanted to update and say that this
> was indeed a kernel bug, and fixed in Linux commit
> 7f6e3cbbd60044102373f5a7f86d5f4e89a99747 (included in 5.15.17 in both
> vanilla and linux-libre).

Thank you for the update! It’s always nice to avoid


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