Bug 306493 - Sound card outputs some sound while the VOLUME is set at ZERO
Summary: Sound card outputs some sound while the VOLUME is set at ZERO
Status: RESOLVED NOT A BUG
Alias: None
Product: kmix
Classification: Applications
Component: general (show other bugs)
Version: 4.1
Platform: Fedora RPMs Linux
: NOR normal
Target Milestone: ---
Assignee: Christian Esken
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2012-09-09 13:39 UTC by Andrei ILIE
Modified: 2012-10-04 00:00 UTC (History)
4 users (show)

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Description Andrei ILIE 2012-09-09 13:39:33 UTC
Setting volume @ zero doesn't work correctly, as the sound card still outputs some sound. On the other side, muting works ok...

SOLUTION - Upon setting volume @ zero, two things should happen:
      ~ the sound card should be silent;
      ~ the mute flag for the respective chanel should be set system-wide.

More or less related reports:
      Bug 292618 - OSD should show "0%" volume when muted
      Bug 292616 - "Sound muted" icon is hard to recognize in OSD
      Bug 248050 - mute doesn't work in kmix 


Reproducible: Always




$ yum list installed phonon*
      phonon.x86_64, 4.6.0-3.fc17
      phonon-backend-vlc.x86_64, 0.6.0-1.fc17

$ cat /proc/asound/cards
      0 [Intel          ]: HDA-Intel - HDA Intel
                              HDA Intel at 0xfe8f4000 irq 45
Comment 1 Harald Sitter 2012-09-09 14:38:27 UTC
In which application?
Comment 2 Andrei ILIE 2012-09-09 18:06:56 UTC
Let's say that Amarok plays some music and we alter the volume using two different ways:

FAIL: After setting the master's channel volume to zero via KMix, the soundcard still outputs __some__ music.

OK: After setting the volume to zero within Amarok, the soundcard becomes silent, as expected.
Comment 3 Andrei ILIE 2012-09-09 18:16:29 UTC
When Phonon uses PulseAudio's __virtual__ soundcard,
      nor the current issue,
      neither bug 306502 "KMix / Phonon can only change volume in increments of ~3 %"
can't be reproduced.
Comment 4 Harald Sitter 2012-09-09 18:22:58 UTC
So it's a bug in KMix?
Comment 5 Andrei ILIE 2012-09-09 18:30:46 UTC
I don't know the exact KDE infrastructure, but for sure this is Phonon or KMix related.
Comment 6 Myriam Schweingruber 2012-09-10 01:56:02 UTC
And which exact KDE version is this about?
Comment 7 Andrei ILIE 2012-09-11 15:40:23 UTC
Fedora 17 / KDE 4.8.5
Comment 8 Andrei ILIE 2012-09-12 19:31:28 UTC
Please note that I reported this bug against KMix 4.1, not 4.2.

Also, this reports may be related:
      Bug 86065 - volume changes rounded to increments of ~3% 
      Bug 306512 - KMix can only change volume in increments of ~3 %
Comment 9 Myriam Schweingruber 2012-09-12 20:12:17 UTC
(In reply to comment #8)
> Please note that I reported this bug against KMix 4.1, not 4.2.
> 
You didn't specify initially...
Comment 10 Christian Esken 2012-09-20 10:35:03 UTC
Please check whether other mixers show the same behavior.
If you use ALSA directly, check with alsamixer started in a Konsole
If you use Pulseaudio, check with pavucontrol

What you are using can be found in KMix Main Window:
Menu => Help => Hardware information

Please report back here.
Comment 11 Andrei ILIE 2012-09-20 10:53:19 UTC
I use ALSA driver.

Alsamixer shows the exact same behaviour - the soundcard outputs some sound while master volume is set at 0.
Comment 12 Christian Esken 2012-10-04 00:00:14 UTC
As this is not a KMix bug (alsamixer behaves the same), I will close this bug report. You might instead consider to open a bug report at the ALSA soundcard driver project (http://www.alsa-project.org/).