Bug 520148

Summary:	g-v-c does not show 'base volume' on volume sliders
Product:	[Fedora] Fedora	Reporter:	Bill Nottingham <notting>
Component:	gnome-media	Assignee:	Bastien Nocera <bnocera>
Status:	CLOSED RAWHIDE	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	medium	Docs Contact:
Priority:	low
Version:	rawhide	CC:	bnocera, lkundrak, lpoetter, mclasen, rvokal, wtogami
Target Milestone:	---
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Hardware:	All
OS:	Linux
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Fixed In Version:		Doc Type:	Bug Fix
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Clone Of:		Environment:
Last Closed:	2009-10-07 10:05:07 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Bill Nottingham 2009-08-28 15:59:10 UTC

Description of problem:

When adjusting the PCM mixer slider of my hardware (Intel HDA), the '75%' level is 0dB gain.

If it's adjusted higher, it starts causing distortion.

As PA adjusts the PCM value when doing volume adjustments, this means that it can set the volume this high, degrading the sound output.

Is there a way to have PA essentailly 'cap' its raising of the PCM volume at 75% (config file or otherwise)? I'm not finding one.

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

pulseaudio-0.9.16-10.test6.fc12.x86_64

Comment 1 Lennart Poettering 2009-08-28 16:27:43 UTC

pavucontrol shows the "base" volume on the slider, which is where PCM and master are at what alsa calls 0dB.  Just make sure not to move the slider higher than this position and you are safe.

g-v-c unfortunately does not show the position of the "base" volume on its sliders. It does do that for recording, but not for playback. It would be good if g-v-c did for both.

Will reassign to gnome-media.

Comment 2 Lennart Poettering 2009-08-28 20:59:52 UTC

You can use "pacmd list-sinks" to check whether your volume is higher than the 'base' volume.

Comment 3 Bastien Nocera 2009-09-16 16:28:46 UTC

This bug is pretty much the same:
https://bugzilla.gnome.org/show_bug.cgi?id=591285

Can you please attach the output of "pacmd list-sinks" as requested by Lennart?

If the base volume is different from the "100%" volume, then you'd see an "unamplified" with the upstream patch.

Comment 4 Bill Nottingham 2009-09-16 18:24:21 UTC

$ pacmd list-sinks
Welcome to PulseAudio! Use "help" for usage information.
>>> 1 sink(s) available.
  * index: 0
	name: <alsa_output.pci-0000_00_1b.0.analog-stereo>
	driver: <module-alsa-card.c>
	flags: HARDWARE HW_MUTE_CTRL HW_VOLUME_CTRL DECIBEL_VOLUME LATENCY FLAT_VOLUME DYNAMIC_LATENCY
	state: RUNNING
	suspend cause: 
	priority: 9959
	volume: 0:  56% 1:  56%
	        0: -15.00 dB 1: -15.00 dB
	        balance 0.00
	base volume:  56%
	             -15.00 dB

alsamixer says the hw Master is 97 (0dB), PCM 74 (0dB).

Comment 5 Bastien Nocera 2009-09-16 18:36:31 UTC

The upstream bug should fix it. I'll do a build for you to test when I've checked it doesn't have side-effects.

Comment 6 Matthias Clasen 2009-09-29 17:57:31 UTC

Bastien, any update on this ?

Comment 7 Bastien Nocera 2009-10-07 10:05:07 UTC

Fixed in 2.28.1 builds across F-11, F-12 and rawhide.