linux-kernel - Re: [regression] Mute button LED stopped working on Lenovo X1 Extreme

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Message-ID: <20181214173038.GA29601@kroah.com>
Date:   Fri, 14 Dec 2018 18:30:38 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Bartosz Golaszewski <brgl@...ev.pl>
Cc:     Takashi Iwai <tiwai@...e.de>, Hui Wang <hui.wang@...onical.com>,
        Kailang Yang <kailang@...ltek.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        stable <stable@...r.kernel.org>
Subject: Re: [regression] Mute button LED stopped working on Lenovo X1 Extreme

On Fri, Dec 14, 2018 at 06:20:10PM +0100, Bartosz Golaszewski wrote:
> Hi,
> 
> I'm not sure what the connection is exactly but commit dcd51305cd41
> ("ALSA: hda/realtek - fix the pop noise on headphone for lenovo
> laptops") broke the mute button LED on my Lenovo X1 Extreme laptop.
> 
> I don't have any more info frankly and don't even know where to start
> debugging. Other LEDs work fine. This mute button LED never had any
> entry in /sys/class/leds, I'm not sure how it's handled.
> 
> Let me know if you need more debugging on my part.

There is a fix for this in the 4.19-rc tree right now.  It's in Linus's
tree if you want to just use that repo, or just wait a few days and it
will be in the next 4.19.y release.

thanks,

greg k-h