CORRECTION: APPLIED[B,C]: [SRU][B/C/D/unstable][PATCH 0/1] fix the pop noise for lenovo laptops with alc285

[Khaled Elmously]

This fix is applied to the 'backlog' of the above branches. It should be picked up in the January SRU cycle

On 2018-11-28 01:43:37 , Khaled Elmously wrote:
> On 2018-11-27 10:42:02 , Hui Wang wrote:
> > BugLink: https://bugs.launchpad.net/bugs/1805079
> > 
> > [Impact]
> > Lenovo told us that some linux uers reported headphone noise on Lenovo's
> > website. After investigating, we found those Lenovo laptop mdoels all
> > have the codec of alc285, and we can reproduce the noise problem too.
> > 
> > [Fix]
> > Don't use the DAC of headphone, let headphone share the DAC with speaker,
> > the noise disappears.
> > 
> > [Test Case]
> > After applying this patch, we tested on Lenovo P52, P72, X1 carbon and X1
> > Yoda2, no noise anymore
> > 
> > [Regression Potential]
> > Low. This patch only apply to several lenovo machines, and after applying
> > this patch, both speaker and headphone still work very well.
> > 
> > 
> > Hui Wang (1):
> >   ALSA: hda/realtek - fix the pop noise on headphone for lenovo laptops
> > 
> >  sound/pci/hda/patch_realtek.c | 20 ++++++++++++++++++++
> >  1 file changed, 20 insertions(+)
> > 
> > -- 
> > 2.17.1
> > 
> > 
> > -- 
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