Re: S/PDIF not detected anymore / regression on recent kernel 6.7 ?

["Linux regression tracking (Thorsten Leemhuis)" <regressions@xxxxxxxxxxxxx>]

On 05.02.24 08:09, Serge SIMON wrote:
> 
> Any news on this ?

Apparently not. I added the sound maintainers just to be sure they are
aware of this.

> Just to say that i tried the 6.7.3 version and i have the exact same
> problem as described below
> ("linux-headers-6.7.3.arch1-2-x86_64.pkg.tar.zst" for the exact ARCH
> package, of course with a system fully up-to-date and rebooted) : no
> more S/PDIF device detected after reboot (only the monitors are
> detected, but not anymore the S/PDIF output at motherboard level-
> which is what i'm using).
> 
> Reverting to 6.6.10 does solve the issue, so per what i'm seeing,
> something has definitely been broken between 6.6.10 and 6.7.0 on that
> topic.

Unless the sound maintainers come up with something, we most likely need
a bisection from you to resolve this.

In case you want to perform a bisection, this guide I'm currently
working on might help:

https://www.leemhuis.info/files/misc/How%20to%20bisect%20a%20Linux%20kernel%20regression%20%e2%80%94%20The%20Linux%20Kernel%20documentation.html

> Is this tracked by a bug somewhere ? Does i have to open one (in
> addition to these mails) ?

No, this thread (for now) is enough.

Ciao, Thorsten


> On Wed, Jan 17, 2024 at 6:39 AM Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx> wrote:
>>
>> On Tue, Jan 16, 2024 at 09:49:59PM +0100, Serge SIMON wrote:
>>> Dear Kernel maintainers,
>>>
>>> I think i'm encountering (for the first time in years !) a regression
>>> with the "6.7.arch3-1" kernel (whereas no issues with
>>> "6.6.10.arch1-1", on which i reverted).
>>>
>>> I'm running a (up-to-date, and non-LTS) ARCHLINUX desktop, on a ASUS
>>> B560-I motherboard, with 3 monitors (attached to a 4-HDMI outputs
>>> card), plus an audio S/PDIF optic output at motherboard level.
>>>
>>> With the latest kernel, the S/PIDF optic output of the motherboard is
>>> NOT detected anymore (and i haven't been able to see / find anything
>>> in the logs at quick glance, neither journalctl -xe nor dmesg).
>>>
>>> Once reverted to 6.6.10, everything is fine again.
>>>
>>> For example, in a working situation (6.6.10), i have :
>>>
>>> cat /proc/asound/pcm
>>> 00-00: ALC1220 Analog : ALC1220 Analog : playback 1 : capture 1
>>> 00-01: ALC1220 Digital : ALC1220 Digital : playback 1
>>> 00-02: ALC1220 Alt Analog : ALC1220 Alt Analog : capture 1
>>> 01-03: HDMI 0 : HDMI 0 : playback 1
>>> 01-07: HDMI 1 : HDMI 1 : playback 1
>>> 01-08: HDMI 2 : HDMI 2 : playback 1
>>> 01-09: HDMI 3 : HDMI 3 : playback 1
>>>
>>> Whereas while on the latest 6.7 kernel, i only had the 4 HDMI lines
>>> (linked to a NVIDIA T600 card, with 4 HDMI outputs) and not the three
>>> first ones (attached to the motherboard).
>>>
>>> (of course i did several tests with 6.7, reboot, ... without any changes)
>>>
>>> Any idea ?
>>
>> As this is a sound issue, perhaps send this to the
>> linux-sound@xxxxxxxxxxxxxxx mailing list (now added).
>>
>> Any chance you can do a 'git bisect' between 6.6 and 6.7 to track down
>> the issue?  Or maybe the sound developers have some things to ask about
>> as there are loads of debugging knobs in sound...
>>
>> thanks,
>>
>> greg k-h
> 
>