alsa/realtek: adjust max output valume for headphone on 2 LG machines
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
HWE Next |
New
|
Undecided
|
Unassigned | ||
linux (Ubuntu) |
In Progress
|
High
|
Hui Wang | ||
Jammy |
Fix Committed
|
Medium
|
Unassigned | ||
Mantic |
Fix Committed
|
Medium
|
Unassigned | ||
Noble |
In Progress
|
High
|
Hui Wang |
Bug Description
[Impact]
In an oem project, we found the max playback volume of the headphone
is too high on 2 LG machines, it could bring harm to listeners. As
requested by OEM customer, we need to decrease the max volume.
[Fix]
Cherry-pick a mainline kernel patch, this could fix this issue.
[Test]
Booting with the patched kernel, plug the headphone, set the playback
volue to max, run:
amixer -c1 contents | grep -n2 "Headphone Playback Volume"
The value is 77,77 instead of 87,87 like below:
numid=1,
; type=INTEGER,
: values=77,77
[Where problems could occur]
This patch changes the amplifier's default value, probably
will make the audio malfunction, but this change is specific
to those 2 LG machines (by SSID), will not bring regression
to other machines. For those 2 machines, we already tested patch,
the audio worked well.
affects: | linux-oem-6.5 (Ubuntu) → linux (Ubuntu) |
Changed in linux (Ubuntu Jammy): | |
status: | New → In Progress |
Changed in linux (Ubuntu Mantic): | |
status: | New → In Progress |
Changed in linux (Ubuntu Noble): | |
status: | New → In Progress |
tags: | added: jinju oem-priority originate-from-2055127 |
summary: |
- alsa/realtek: adjust headphone max output valume on 2 LG machines + alsa/realtek: adjust max output valume for headphone on 2 LG machines |
description: | updated |
Changed in linux (Ubuntu Jammy): | |
importance: | Undecided → High |
Changed in linux (Ubuntu Mantic): | |
importance: | Undecided → High |
Changed in linux (Ubuntu Noble): | |
importance: | Undecided → High |
Changed in linux (Ubuntu Mantic): | |
status: | In Progress → Fix Committed |
importance: | High → Medium |
Changed in linux (Ubuntu Jammy): | |
importance: | High → Medium |
status: | In Progress → Fix Committed |
This bug is awaiting verification that the linux/5. 15.0-104. 114 kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification- needed- jammy-linux' to 'verification- done-jammy- linux'. If the problem still exists, change the tag 'verification- needed- jammy-linux' to 'verification- failed- jammy-linux' .
If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed.
See https:/ /wiki.ubuntu. com/Testing/ EnableProposed for documentation how to enable and use -proposed. Thank you!