From: Hans de Goede <hdegoede@redhat.com>
To: Thorsten Leemhuis <regressions@leemhuis.info>,
Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.com>
Cc: sonic82003@gmail.com, plum <plumerlis@gmail.com>,
"regressions@lists.linux.dev" <regressions@lists.linux.dev>,
alsa-devel@alsa-project.org, LKML <linux-kernel@vger.kernel.org>
Subject: Re: [regression] Bug 216818 - The microphone mute led not working after linux 6
Date: Mon, 19 Dec 2022 11:00:11 +0100 [thread overview]
Message-ID: <572159b3-a1a4-8735-d435-ea574c07851f@redhat.com> (raw)
In-Reply-To: <bf52f4c5-5cca-26d7-7fb2-ac8ecb5b24c5@leemhuis.info>
Hi,
On 12/19/22 10:17, Thorsten Leemhuis wrote:
> Hi, this is your Linux kernel regression tracker speaking.
>
> I noticed a regression report in bugzilla.kernel.org. As many (most?)
> kernel developer don't keep an eye on it, I decided to forward it by
> mail. Quoting from https://bugzilla.kernel.org/show_bug.cgi?id=216818 :
>
>> sonic82003@gmail.com 2022-12-18 08:52:32 UTC
>>
>> The mic mute led of my ThinkPad X1 Carbon Gen 9 doesn't work anymore after updating linux to version 6.
>> I can still turn it on by running
>>
>> echo 1 > /sys/class/leds/platform::micmute/brightness
>>
>> With linux-lts it still works fine.
>
> See the ticket for more details.
>
> Note, I found a similar report that (despite my attempts to prevent
> things like this from happening) fell through the cracks here:
> https://bugzilla.kernel.org/show_bug.cgi?id=216355
>
>> plum 2022-08-13 02:11:01 UTC
>>
>> I upgrade to kernel 5.19.1 but found my thinkpad x1 carbon 2021's mute led stop working.
>>
>> Function is okay but LED won't light up.
>>
>> Back to kernel 5.18 and it's normal and working again.
>>
>> Fedora 36 64 bit
>> Gnome-shell 42
>
> From a quick research it looks to me like this is an issue for the
> sounds maintainers, as the LED itself apparently works. If that is
> something for the platform people instead please speak up.
Thanks for bringing this up, we recently hit this in Fedora too
and we have a fix/workaround there. Let me copy and paste what
I just added to bko216355 :
This is caused by a behavior change of the kernel code controlling the LED to only turn on the LED when all inputs, including e.g. the jack mic input are turned off in the alsa-mixer settings.
But most userspace code only turns the mic which it is actually using on/off when you hit the mic-mute hotkey.
Also see: https://bugzilla.redhat.com/show_bug.cgi?id=2134824
Which is the same bug.
There is a set of fixes available in the form of an alsa-ucm update which tells the kernel to ignore the state of the jack mic input restoring the old behavior:
https://git.alsa-project.org/?p=alsa-ucm-conf.git;a=commitdiff;h=79a8ec44d3dcf097f4a4492c506cbcf338324175
https://git.alsa-project.org/?p=alsa-ucm-conf.git;a=commitdiff;h=9ce9ddb4a84fb467602b716575ea1d8f2bab0c39
Regards,
Hans
WARNING: multiple messages have this Message-ID (diff)
From: Hans de Goede <hdegoede@redhat.com>
To: Thorsten Leemhuis <regressions@leemhuis.info>,
Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
alsa-devel@alsa-project.org, plum <plumerlis@gmail.com>,
sonic82003@gmail.com,
"regressions@lists.linux.dev" <regressions@lists.linux.dev>
Subject: Re: [regression] Bug 216818 - The microphone mute led not working after linux 6
Date: Mon, 19 Dec 2022 11:00:11 +0100 [thread overview]
Message-ID: <572159b3-a1a4-8735-d435-ea574c07851f@redhat.com> (raw)
In-Reply-To: <bf52f4c5-5cca-26d7-7fb2-ac8ecb5b24c5@leemhuis.info>
Hi,
On 12/19/22 10:17, Thorsten Leemhuis wrote:
> Hi, this is your Linux kernel regression tracker speaking.
>
> I noticed a regression report in bugzilla.kernel.org. As many (most?)
> kernel developer don't keep an eye on it, I decided to forward it by
> mail. Quoting from https://bugzilla.kernel.org/show_bug.cgi?id=216818 :
>
>> sonic82003@gmail.com 2022-12-18 08:52:32 UTC
>>
>> The mic mute led of my ThinkPad X1 Carbon Gen 9 doesn't work anymore after updating linux to version 6.
>> I can still turn it on by running
>>
>> echo 1 > /sys/class/leds/platform::micmute/brightness
>>
>> With linux-lts it still works fine.
>
> See the ticket for more details.
>
> Note, I found a similar report that (despite my attempts to prevent
> things like this from happening) fell through the cracks here:
> https://bugzilla.kernel.org/show_bug.cgi?id=216355
>
>> plum 2022-08-13 02:11:01 UTC
>>
>> I upgrade to kernel 5.19.1 but found my thinkpad x1 carbon 2021's mute led stop working.
>>
>> Function is okay but LED won't light up.
>>
>> Back to kernel 5.18 and it's normal and working again.
>>
>> Fedora 36 64 bit
>> Gnome-shell 42
>
> From a quick research it looks to me like this is an issue for the
> sounds maintainers, as the LED itself apparently works. If that is
> something for the platform people instead please speak up.
Thanks for bringing this up, we recently hit this in Fedora too
and we have a fix/workaround there. Let me copy and paste what
I just added to bko216355 :
This is caused by a behavior change of the kernel code controlling the LED to only turn on the LED when all inputs, including e.g. the jack mic input are turned off in the alsa-mixer settings.
But most userspace code only turns the mic which it is actually using on/off when you hit the mic-mute hotkey.
Also see: https://bugzilla.redhat.com/show_bug.cgi?id=2134824
Which is the same bug.
There is a set of fixes available in the form of an alsa-ucm update which tells the kernel to ignore the state of the jack mic input restoring the old behavior:
https://git.alsa-project.org/?p=alsa-ucm-conf.git;a=commitdiff;h=79a8ec44d3dcf097f4a4492c506cbcf338324175
https://git.alsa-project.org/?p=alsa-ucm-conf.git;a=commitdiff;h=9ce9ddb4a84fb467602b716575ea1d8f2bab0c39
Regards,
Hans
next prev parent reply other threads:[~2022-12-19 10:00 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-12-19 9:17 [regression] Bug 216818 - The microphone mute led not working after linux 6 Thorsten Leemhuis
2022-12-19 9:17 ` Thorsten Leemhuis
2022-12-19 10:00 ` Hans de Goede [this message]
2022-12-19 10:00 ` Hans de Goede
2022-12-19 10:27 ` Thorsten Leemhuis
2022-12-19 10:27 ` Thorsten Leemhuis
2022-12-19 17:01 ` Jaroslav Kysela
2022-12-19 17:01 ` Jaroslav Kysela
2023-01-10 9:33 ` Linux kernel regression tracking (Thorsten Leemhuis)
2023-01-10 9:33 ` Linux kernel regression tracking (Thorsten Leemhuis)
2023-06-20 13:57 ` Linux regression tracking #update (Thorsten Leemhuis)
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