APPLIED: [SRU][unstable][PATCH v2] ALSA: hda/realtek: Disable PC beep in passthrough on alc285

[Hui Wang]

On 2019/2/22 下午6:51, Seth Forshee wrote:
> On Fri, Feb 22, 2019 at 06:33:07PM +0800, Hui Wang wrote:
>> BugLink: http://bugs.launchpad.net/bugs/1817263
>>
>> 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>
>> Signed-off-by: Takashi Iwai <tiwai at suse.de>
>> (cherry picked from commit c8c6ee611926685a7d753409e0a6e48b9e1b8748
>> git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound.git)
>> Signed-off-by: Hui Wang <hui.wang at canonical.com>
> I already applied to unstable from the v1 patches, but this looks to be
> identical.
>
Yes, it is identical. In the v2, only the patch 0001-xxx.patch for Disco
is changed, others are identical to v1.