Bug 863197 - 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
Keywords:
Status: CLOSED NOTABUG
Alias: None
Product: Fedora
Classification: Fedora
Component: alsa-firmware
Version: 17
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: ---
Assignee: Tim Jackson
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2012-10-04 16:14 UTC by Andrei ILIE
Modified: 2012-10-04 18:01 UTC (History)
2 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2012-10-04 18:01:59 UTC
Type: Bug
Embargoed:

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System ID Private Priority Status Summary Last Updated
KDE Software Compilation 306493 0 None None None 2012-10-04 16:14:51 UTC

Description Andrei ILIE 2012-10-04 16:14:51 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.


$ cat /proc/asound/cards 0
  [Intel ]: HDA-Intel - HDA Intel
  HDA Intel at 0xfe8f4000 irq 45

$ yum list installed *phonon* *alsa*
  alsa-firmware.noarch 1.0.25-1.fc17
  alsa-lib.x86_64 1.0.26-1.fc17
  alsa-lib-debuginfo.x86_64 1.0.26-1.fc17
  alsa-tools-firmware.x86_64 1.0.26.1-1.fc17
  alsa-utils.x86_64 1.0.26-1.fc17
  phonon.x86_64 4.6.0-3.fc17
  phonon-backend-gstreamer.x86_64 2:4.6.2-1.fc17
  phonon-backend-vlc.x86_64 0.6.0-1.fc17
Comment 1 Jaroslav Kysela 2012-10-04 18:01:59 UTC 
Mute & volume are two different things. Some hardware does not mute the signal path when the volume register is set to the minimum. Usually, the HDA hardware can have -48dB .. 0dB signal ranges. ALSA copies this.
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