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Bug#819100: linux-image-4.4.0-1-amd64: Mute and Mic-Mute LEDs no longer work on Thinkpad T410

Cross-posted to 2 groups.

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On 23/03/16 21:32, Ben Hutchings wrote:
> Control: tag -1 moreinfo
>
> On Wed, 2016-03-23 at 18:53 +0000, Tim Wootton wrote:
>> Package: src:linux
>> Version: 4.4.6-1
>> Severity: normal
>>
>> Dear Maintainer,
>>
>>    * What led up to the situation?
>>         Upgrade from jessie to stretch
>>    * What exactly did you do (or not do) that was effective (or
>>      ineffective)?
>>         Pressing Thnkpad T410's hardware speaker mute button
>>    * What was the outcome of this action?
>>         Speaker mutes, but the button's LED does not illuminate
>>    * What outcome did you expect instead?
>>         Expected the LED to illuminate
>>
>> The mic mute button also exhibits the same behavior, but I had not
>> tried this under jessie so don't know if it worked before.
> It hasn't worked for me on the quite similar T420.
>
>>  The speaker mute certainly did.
> [...]
>
> As far as the kernel is concerned, the mute button is just an ordinary
> key on the keyboard (you can see this with the evtest program).  You
> need a userland daemon to act on it (such as pulseaudio).  What desktop
> environment are you using?
The button is working fine, it's the LED that's not. I see this from the
kernel module docs which implies userspace is not the answer.

"Audio mute and microphone mute LEDs are supported, but currently not
visible to userspace. They are used by the snd-hda-intel audio driver."

I'm using KDE5.


>
> Ben.
>

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Bug#819100: linux-image-4.4.0-1-amd64: Mute and Mic-Mute LEDs no longer work on Thinkpad T410 Tim Wootton <tim@tee-jay.org.uk> - 2016-03-23 20:00 +0100
  Bug#819100: linux-image-4.4.0-1-amd64: Mute and Mic-Mute LEDs no longer work on Thinkpad T410 Ben Hutchings <ben@decadent.org.uk> - 2016-03-23 22:40 +0100
    Bug#819100: linux-image-4.4.0-1-amd64: Mute and Mic-Mute LEDs no longer work on Thinkpad T410 Ben Hutchings <ben@decadent.org.uk> - 2016-03-23 23:10 +0100
    Bug#819100: linux-image-4.4.0-1-amd64: Mute and Mic-Mute LEDs no longer work on Thinkpad T410 Tim Wootton <tim@tee-jay.org.uk> - 2016-03-24 07:50 +0100
  Processed: Re: Bug#819100: linux-image-4.4.0-1-amd64: Mute and  Mic-Mute LEDs no longer work on Thinkpad T410 owner@bugs.debian.org (Debian Bug Tracking System) - 2016-03-23 22:40 +0100

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