GNOME Bugzilla – Bug 591795
application-specific volume control affects master volume
Last modified: 2009-08-14 12:56:27 UTC
Please describe the problem: Changing application-specific volume in gnome-volume-control changes the master volume. Muting works as intended per-application. Tested with rhythmbox, banshee and totem as sound playing applications. Steps to reproduce: 1. open totem, play any video 2. right click on the mixer icon in the notification area, open settings dialog, go to applications tab 3. change the volume using the totem slider Actual results: master and totem volume moves Expected results: only totem volume moves Does this happen every time? yes Other information: gnome-media info: =============== Architecture: i386 Date: Sun Aug 9 16:23:02 2009 DistroRelease: Ubuntu 9.10 ExecutablePath: /usr/bin/gnome-volume-control Package: gnome-media 2.27.5-0ubuntu1 ProcEnviron: PATH=(custom, user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcVersionSignature: Ubuntu 2.6.31-5.24-generic SourcePackage: gnome-media Uname: Linux 2.6.31-5-generic i686 Pulseaudio info: =============== Architecture: i386 ArecordDevices: **** List of CAPTURE Hardware Devices **** card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog] Subdevices: 2/2 Subdevice #0: subdevice #0 Subdevice #1: subdevice #1 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: janne 8730 F.... pulseaudio /dev/snd/pcmC0D0p: janne 8730 F...m pulseaudio Card0.Amixer.info: Card hw:0 'Intel'/'HDA Intel at 0xfe9fc000 irq 21' Mixer name : 'SigmaTel STAC9205' Components : 'HDA:838476a0,102801f9,00100204 HDA:14f12c06,14f1000f,00100000' Controls : 25 Simple ctrls : 16 DistroRelease: Ubuntu 9.10 Package: pulseaudio 1:0.9.16~test4-0ubuntu4 PackageArchitecture: i386 ProcEnviron: SHELL=/bin/bash PATH=(custom, user) LANG=en_US.UTF-8 ProcVersionSignature: Ubuntu 2.6.31-5.24-generic Uname: Linux 2.6.31-5-generic i686 UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare vboxusers Originally reported in https://bugs.launchpad.net/ubuntu/+source/gnome-media/+bug/411042 Issue can be reproduced by other people but apparently not by everyone (check original report for info)
This is the flat-volumes feature of PulseAudio, nothing to do with gnome-volume-control (you can reproduce this using pavucontrol as well).
Could this "feature" be disabled by default? I don't see why it's been introduced; this feature looks like an intentional bug to me.
The question is why somebody cannot reproduce it on the same distro/version (see Sebastien's comments in the Ubuntu bug). in /etc/pulse/daemon.conf we both have ; flat-volumes = yes but still different results. Since the flat volumes feature of pulseaudio seems rather complex with different "reference" and "virtual" volumes [0], could it be that g-v-c maps the main volume slider to a different volume setting in pulseaudio depending on the hardware? If yes then this would be a real bug IMHO. [0] http://www.mail-archive.com/pulseaudio-discuss@mail.0pointer.de/msg03723.html
(In reply to comment #3) <snip> > Since the flat volumes feature of pulseaudio seems rather complex with > different "reference" and "virtual" volumes [0], could it be that g-v-c maps > the main volume slider to a different volume setting in pulseaudio depending on > the hardware? No, gnome-volume-control has no concept of hardware, or tracks.