Bug 1248649

Summary: Sound mute below 35% volume with external USB audio controller C-Media (0d8c:000c)
Product: [Fedora] Fedora Reporter: Basic Six <drbasic6>
Component: pulseaudioAssignee: Lennart Poettering <lpoetter>
Status: CLOSED EOL QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 23CC: coder, lkundrak, lpoetter, rdieter, wtaymans
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Fixed In Version: Doc Type: Bug Fix
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Last Closed: 2016-12-20 14:19:59 UTC Type: Bug
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description Basic Six 2015-07-30 14:07:16 UTC
Description of problem:

Using an external USB audio controller, the output is suddenly mute when lowering the volume below 35%. This is disturbing because it's impossible to keep playing music in the background.



Version-Release number of selected component (if applicable):

Fedora 22



How reproducible:

Everytime. Also, when fixed somehow, the issue reappears after major updates or upgrades (like from F21 to F22).



Steps to Reproduce:
1. Play music file
2. Turn volume up above 35% -> loud music
3. Turn it down below 35% -> no sound anymore



Actual results:

Quiet below 35.



Expected results:

Volume regulation below 35% should work just like above 35%. It seems odd that some piece of software can't handle a volume below 35%.



Additional info:

Some time ago (F21), changing a system config file (not sure what exactly) fixed it - until the upgrade to F22.

Comment 1 Basic Six 2015-07-30 14:21:04 UTC
This is how the config change fixed the issue:

From:
https://chrisjean.com/fix-for-usb-audio-is-too-loud-and-mutes-at-low-volume-in-ubuntu/

Config file:
/usr/share/pulseaudio/alsa-mixer/paths/analog-output.conf.common

Look for the [Element PCM] section:

[Element PCM]
switch = mute
volume = merge
override-map.1 = all 
override-map.2 = all-left,all-right

Replace the "volume = merge" line with these two lines:
volume = ignore
volume-limit = 0.01

Details on what value to use (instead of 0.01) are explained on that page.

---

This should be fixed - it's extremely awkward that there's no sound below 35% volume (by default). If config files have to be changed to "fix" this, then it's not working from a user's perspective. And most users won't (and probably shouldn't) open and edit system config files as root.

Comment 2 Basic Six 2015-12-23 10:13:25 UTC
Same issue after upgrading to Fedora 23.
However, the config file modification does not seem to fix it anymore.

Comment 3 Fedora End Of Life 2016-11-24 12:15:29 UTC
This message is a reminder that Fedora 23 is nearing its end of life.
Approximately 4 (four) weeks from now Fedora will stop maintaining
and issuing updates for Fedora 23. It is Fedora's policy to close all
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Comment 4 Fedora End Of Life 2016-12-20 14:19:59 UTC
Fedora 23 changed to end-of-life (EOL) status on 2016-12-20. Fedora 23 is
no longer maintained, which means that it will not receive any further
security or bug fix updates. As a result we are closing this bug.

If you can reproduce this bug against a currently maintained version of
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bug.

Thank you for reporting this bug and we are sorry it could not be fixed.

Comment 5 Star Brilliant 2017-08-16 11:57:17 UTC
A bug report has been proposed in ALSA:
https://bugzilla.kernel.org/show_bug.cgi?id=196669

The patch should fix this problem for C-Media devices.