Bug 1298588

Summary:	flat volumes have a serious bug that did not have before
Product:	[Fedora] Fedora	Reporter:	Sergio Basto <sergio>
Component:	pulseaudio	Assignee:	Lennart Poettering <lpoetter>
Status:	CLOSED DUPLICATE	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	23	CC:	lpoetter, mcatanzaro+wrong-account-do-not-cc, rdieter, wtaymans
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Fixed In Version:		Doc Type:	Bug Fix
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Last Closed:	2016-01-18 21:54:43 UTC	Type:	Bug
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
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Description Sergio Basto 2016-01-14 13:47:49 UTC

Description of problem:

Some people claim the same problem 
https://bugs.kde.org/show_bug.cgi?id=324975#c98

flat-volumes have a serious bug , I explained first here https://bugs.kde.org/show_bug.cgi?id=355758 but now I see that same happens in pavucontrol , in KDE, even without kmix running.  

Increasing the volume of one stream increases the volume of master channel , doesn't make sense I increasing volume sound in one stream audio and master audio is also increased ? . When I choose volume in one stream , master volume control shouldn't change to the same level of sound of the stream. 
Worst is I have a app saved which the stream was saved at maximum, I left application , I reduce master volume to very low level but not mute, I open the app and volume goes to maximum (same level of the stream of the app). Disabling flat-volumes , things back to normal i. e. master volume doesn't change when I change the level of a stream sound .

I don't want disable flat-volumes, I want someone fix flat-volumes in pulseaudio

Actual results:
I increasing volume sound in one stream and master is also increased

Expected results:
When I increasing volume sound in one stream and the master audio doesn't change 

Additional info:

Comment 1 Rex Dieter 2016-01-14 14:35:08 UTC

As far as I understand, your description matches what flat volumes is designed to do.  Sounds like you simply don't like that.

Comment 2 Rex Dieter 2016-01-14 14:36:13 UTC

(that said, apps that change volumes on their own *is* a problem, they shouldn't do that... it's not clear to me if that's the case here or not)

Comment 3 Sergio Basto 2016-01-14 14:41:43 UTC

When I increasing volume sound in one stream, the master channel shouldn't change and that was the behaviour in early of F21 IIRC

Comment 4 Rex Dieter 2016-01-14 14:55:02 UTC

again, what you're describing is precisely what flat-volumes is designed to do, as far as I can tell.

Comment 5 Rex Dieter 2016-01-14 14:56:43 UTC

from https://wiki.archlinux.org/index.php/PulseAudio:

... it scales the device-volume with the volume of the "loudest" application. For example, raising the VoIP call volume will raise the hardware volume and adjust the music-player volume so it stays where it was, without having to lower the volume of the music-player manually.

Comment 6 Rex Dieter 2016-01-14 14:59:46 UTC

from the same section, looks like you're hitting a problematic app:

"Note: The default behavior upstream can sometimes be confusing and some applications, unaware of this feature, can set their volume to 100% at startup, potentially blowing your speakers or your ears..."

Comment 7 Sergio Basto 2016-01-16 16:20:58 UTC

I don't remember this behavior in F19 , F20 and until the middle of F21, 
I thought that flat volumes , should adjust the stream channel and not the master channel .
So I'm not sure about this, but I wonder if the defaults of pulseaudio have changed in these releases, finally if master channel could jump to 100% if a streamer have a bug, I agree that we should disable flat-volumes by default. 

Thanks.

Comment 8 Michael Catanzaro 2016-01-18 21:54:43 UTC


*** This bug has been marked as a duplicate of bug 1265267 ***