click/pop noise in the headphone on several lenovo laptops
Bug #1805079 reported by
Hui Wang
This bug affects 2 people
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Fix Released
|
Critical
|
Hui Wang | ||
Bionic |
Fix Released
|
Undecided
|
Unassigned | ||
Cosmic |
Fix Released
|
Critical
|
Unassigned |
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.
CVE References
Changed in linux (Ubuntu): | |
importance: | Undecided → Critical |
Changed in linux (Ubuntu): | |
status: | Incomplete → Confirmed |
Changed in linux (Ubuntu): | |
status: | Confirmed → Fix Committed |
Changed in linux (Ubuntu Cosmic): | |
importance: | Undecided → Critical |
status: | New → Fix Committed |
Changed in linux (Ubuntu Bionic): | |
status: | New → Fix Committed |
tags: |
added: verification-done-cosmic removed: verification-needed-cosmic |
information type: | Public → Public Security |
tags: | added: cscc |
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This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:
apport-collect 1805079
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the Ubuntu Kernel Team.