| 2018-11-26 06:13:21 |
Hui Wang |
bug |
|
|
added bug |
| 2018-11-26 06:13:32 |
Hui Wang |
linux (Ubuntu): importance |
Undecided |
Critical |
|
| 2018-11-26 06:30:05 |
Ubuntu Kernel Bot |
linux (Ubuntu): status |
New |
Incomplete |
|
| 2018-11-27 02:40:03 |
Hui Wang |
description |
These laptops all have the codec of alc285.
reproduced by:
1. Hookup a set of headphones that you can separately place
in/on your ears. (ie. ear buds)
2. Put only the right headphone in/on your ear.
3. Go to the Gnome sound settings and bring up the "Test
Speakers" function
4. Play the left speaker test
You would expect to hear nothing in the right ear, but instead
you hear a "pop" at the start of each word spoken. ("pop"
Front "pop" left). You can repeat with the left headphone and
see similar results. I even tried shifting the balance all the
way to the left/right and get the same results.
So one problem appears to be when the headphone jack is
initially sent audio, it causes a "pop" in the headphone jack. |
[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. |
|
| 2018-11-27 02:59:15 |
Anthony Wong |
linux (Ubuntu): status |
Incomplete |
Confirmed |
|
| 2018-11-27 16:29:30 |
Seth Forshee |
linux (Ubuntu): status |
Confirmed |
Fix Committed |
|
| 2018-12-05 03:11:54 |
AceLan Kao |
tags |
|
verification-needed-bionic |
|
| 2018-12-09 00:50:39 |
Hui Wang |
tags |
verification-needed-bionic |
verification-done-bionic |
|
| 2019-01-04 14:27:52 |
James Thorne |
bug |
|
|
added subscriber James Thorne |
| 2019-01-14 08:28:21 |
Stefan Bader |
nominated for series |
|
Ubuntu Cosmic |
|
| 2019-01-14 08:28:21 |
Stefan Bader |
bug task added |
|
linux (Ubuntu Cosmic) |
|
| 2019-01-14 08:28:36 |
Stefan Bader |
linux (Ubuntu Cosmic): importance |
Undecided |
Critical |
|
| 2019-01-14 08:28:41 |
Stefan Bader |
linux (Ubuntu Cosmic): status |
New |
Fix Committed |
|
| 2019-01-14 08:41:55 |
Kleber Sacilotto de Souza |
nominated for series |
|
Ubuntu Bionic |
|
| 2019-01-14 08:41:55 |
Kleber Sacilotto de Souza |
bug task added |
|
linux (Ubuntu Bionic) |
|
| 2019-01-14 08:42:00 |
Kleber Sacilotto de Souza |
linux (Ubuntu Bionic): status |
New |
Fix Committed |
|
| 2019-01-15 10:33:06 |
Brad Figg |
tags |
verification-done-bionic |
verification-done-bionic verification-needed-cosmic |
|
| 2019-01-15 11:37:36 |
Hui Wang |
tags |
verification-done-bionic verification-needed-cosmic |
verification-done-bionic verification-done-cosmic |
|
| 2019-01-28 17:12:01 |
Launchpad Janitor |
linux (Ubuntu Bionic): status |
Fix Committed |
Fix Released |
|
| 2019-01-28 17:12:01 |
Launchpad Janitor |
cve linked |
|
2018-14625 |
|
| 2019-01-28 17:12:01 |
Launchpad Janitor |
cve linked |
|
2018-16882 |
|
| 2019-01-28 17:12:01 |
Launchpad Janitor |
cve linked |
|
2018-17972 |
|
| 2019-01-28 17:12:01 |
Launchpad Janitor |
cve linked |
|
2018-18281 |
|
| 2019-01-28 17:12:01 |
Launchpad Janitor |
cve linked |
|
2018-19407 |
|
| 2019-02-04 08:48:45 |
Launchpad Janitor |
linux (Ubuntu Cosmic): status |
Fix Committed |
Fix Released |
|
| 2019-02-04 14:46:37 |
Launchpad Janitor |
linux (Ubuntu): status |
Fix Committed |
Fix Released |
|
| 2019-04-12 09:04:58 |
Lawrence Chiu |
information type |
Public |
Public Security |
|
| 2019-07-24 20:54:17 |
Brad Figg |
tags |
verification-done-bionic verification-done-cosmic |
cscc verification-done-bionic verification-done-cosmic |
|
