[Bug 1805079] Re: click/pop noise in the headphone on several lenovo laptops

@Vadim,

Need to add the code as below:
.chained = true,
.chain_id = ALC269_FIXUP_THINKPAD_ACPI


I will send the patch to fix it.

Thanks.


** Tags removed: verification-needed-bionic
** Tags added: verification-done-bionic

--
You received this bug notification because you are subscribed to linux
in Ubuntu.
Matching subscriptions: Bgg, Bmail, Nb
https://bugs.launchpad.net/bugs/1805079

Title:
click/pop noise in the headphone on several lenovo laptops

Status in linux package in Ubuntu:
Fix Committed

Bug description:
[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.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1805079/+subscriptions