[alsa-devel] [PATCH] ALSA: hda/realtek: Disable PC beep in passthrough on alc285

[Takashi Iwai]

On Thu, 14 Feb 2019 04:41:33 +0100,
Hui Wang wrote:
> 
> It is reported that there's a constant background "hum/whitenoise"
> in the headset on the Lenovo X1 machines with the codec alc285, and it
> is confirmed that if we run the command below, the noise will stop.
>  sudo hda-verb /dev/snd/hwC0D0 0x1d SET_PIN_WIDGET_CONTROL 0x0
> 
> Then I consulted this issue with Kailang, he told me the pin 0x1d on
> this codec is used for PC beep in, the noise probably comes from this
> pin and we can also disable the PC beep in passthrough, then the PC
> beep in will not affect other sound playback.
> 
> Fixes: c4cfcf6f4297 ("ALSA: hda/realtek - fix the pop noise on headphone for lenovo laptops")
> Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1660581
> Cc: <stable at vger.kernel.org>
> Signed-off-by: Kailang Yang <kailang at realtek.com>
> Signed-off-by: Hui Wang <hui.wang at canonical.com>

Thanks, applied now.


Takashi