Bug#697121: vlc: sudden very loud sound to cause hearing demage
fermat
fermat618 at gmail.com
Tue Jan 1 15:22:57 UTC 2013
Package: vlc
Version: 2.0.3-4
Severity: important
Dear Maintainer,
I use a little ear-phone on my computer, and adjust the system volume to about
20%, which is comfortable. I open the VLC player and want to adjust the volume
a little higher. VLC displays the current volume is 100%, so I adjust it to
147%, and I heared a very loud sound I have never imaged. It turned out that
VLC adjust the system volume from 20% to 147%, while the volume 100% it
displays is entirely false and misleading. I think my hearing is hurt since my
ear is rather uncomfortable since then.
I think this is bug both of pulse audio and vlc, so I report bug on both
pulseaudio and vlc.
It is a bug of pulseaudio because it use a default setting that applications
don't have independent volume control. otherwise the volume whill not grow to
147% but rather 20%*147% = 29.4%.
It is apperently a bug of vlc because it displays a very misleading current
volume 100% rather of 20%. Even if some adjust to the volume from 100% to 95%,
it will cause the volume suddenly jumps from 20% to 95%.
-- System Information:
Debian Release: wheezy/sid
APT prefers testing
APT policy: (500, 'testing')
Architecture: amd64 (x86_64)
Foreign Architectures: i386
Kernel: Linux 3.2.0-4-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.utf8, LC_CTYPE=zh_CN.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Versions of packages vlc depends on:
ii dpkg 1.16.9
ii fonts-freefont-ttf 20120503-1
ii libaa1 1.4p5-40
ii libavcodec53 6:0.8.4-1
ii libavutil51 6:0.8.4-1
ii libc6 2.13-37
ii libcaca0 0.99.beta18-1
ii libfreetype6 2.4.9-1
ii libfribidi0 0.19.2-3
ii libgcc1 1:4.7.2-4
ii libgl1-mesa-glx [libgl1] 8.0.5-3
ii libice6 2:1.0.8-2
ii libqtcore4 4:4.8.2+dfsg-2
ii libqtgui4 4:4.8.2+dfsg-2
ii libsdl-image1.2 1.2.12-2
ii libsdl1.2debian 1.2.15-5
ii libsm6 2:1.2.1-2
ii libstdc++6 4.7.2-4
ii libtar0 1.2.16-1
ii libva-x11-1 1.0.15-4
ii libva1 1.0.15-4
ii libvlccore5 2.0.3-4
ii libx11-6 2:1.5.0-1
ii libxcb-composite0 1.8.1-2
ii libxcb-keysyms1 0.3.9-1
ii libxcb-randr0 1.8.1-2
ii libxcb-render0 1.8.1-2
ii libxcb-shape0 1.8.1-2
ii libxcb-shm0 1.8.1-2
ii libxcb-xfixes0 1.8.1-2
ii libxcb-xv0 1.8.1-2
ii libxcb1 1.8.1-2
ii libxext6 2:1.3.1-2
ii libxinerama1 2:1.1.2-1
ii libxpm4 1:3.5.10-1
ii vlc-nox 2.0.3-4
ii zlib1g 1:1.2.7.dfsg-13
Versions of packages vlc recommends:
ii vlc-plugin-notify 2.0.3-4
ii vlc-plugin-pulse 2.0.3-4
ii xdg-utils 1.1.0~rc1+git20111210-6
Versions of packages vlc suggests:
pn videolan-doc <none>
Versions of packages vlc-nox depends on:
ii dpkg 1.16.9
ii liba52-0.7.4 0.7.4-16
ii libasound2 1.0.25-4
ii libass4 0.10.0-3
ii libavahi-client3 0.6.31-1
ii libavahi-common3 0.6.31-1
ii libavc1394-0 0.5.4-1
ii libavcodec53 6:0.8.4-1
ii libavformat53 6:0.8.4-1
ii libavutil51 6:0.8.4-1
ii libbluray1 1:0.2.2-1
ii libc6 2.13-37
ii libcddb2 1.3.2-3
ii libcdio13 0.83-4
ii libcrystalhd3 1:0.0~git20110715.fdd2f19-7
ii libdbus-1-3 1.6.8-1
ii libdc1394-22 2.2.0-2
ii libdca0 0.0.5-5
ii libdirac-decoder0 1.0.2-6
ii libdirac-encoder0 1.0.2-6
ii libdirectfb-1.2-9 1.2.10.0-5
ii libdvbpsi7 0.2.2-1
ii libdvdnav4 4.2.0+20120524-2
ii libdvdread4 4.2.0+20120521-2
ii libebml3 1.2.2-2
ii libfaad2 2.7-8
ii libflac8 1.2.1-6
ii libfontconfig1 2.9.0-7
ii libfreetype6 2.4.9-1
ii libfribidi0 0.19.2-3
ii libgcc1 1:4.7.2-4
ii libgcrypt11 1.5.0-3
ii libgnutls26 2.12.20-2
ii libgpg-error0 1.10-3.1
ii libiso9660-8 0.83-4
ii libkate1 0.4.1-1
ii liblircclient0 0.9.0~pre1-1
ii liblua5.1-0 5.1.5-4
ii libmad0 0.15.1b-7
ii libmatroska5 1.3.0-2
ii libmodplug1 1:0.8.8.4-3
ii libmpcdec6 2:0.1~r459-4
ii libmpeg2-4 0.4.1-3
ii libmtp9 1.1.3-35-g0ece104-4
ii libncursesw5 5.9-10
ii libogg0 1.3.0-4
ii libpng12-0 1.2.49-1
ii libpostproc52 6:0.8.4-1
ii libproxy0 0.3.1-5.1
ii libraw1394-11 2.0.9-1
ii libresid-builder0c2a 2.1.1-13
ii libsamplerate0 0.1.8-5
ii libschroedinger-1.0-0 1.0.11-2
ii libshout3 2.2.2-8
ii libsidplay2 2.1.1-13
ii libsmbclient 2:3.6.6-3
ii libspeex1 1.2~rc1-7
ii libspeexdsp1 1.2~rc1-7
ii libstdc++6 4.7.2-4
ii libswscale2 6:0.8.4-1
ii libtag1c2a 1.7.2-1
ii libtheora0 1.1.1+dfsg.1-3.1
ii libtinfo5 5.9-10
ii libtwolame0 0.3.13-1
ii libudev0 175-7
ii libupnp6 1:1.6.17-1.1
ii libusb-1.0-0 2:1.0.11-1
ii libv4l-0 0.8.8-3
ii libvcdinfo0 0.7.24-1+b1
ii libvlc5 2.0.3-4
ii libvlccore5 2.0.3-4
ii libvorbis0a 1.3.2-1.3
ii libvorbisenc2 1.3.2-1.3
ii libx264-123 2:0.123.2189+git35cf912-1
ii libxml2 2.8.0+dfsg1-7
ii libzvbi0 0.2.33-6
ii zlib1g 1:1.2.7.dfsg-13
Versions of packages libvlc5 depends on:
ii dpkg 1.16.9
ii libc6 2.13-37
ii libvlccore5 2.0.3-4
Versions of packages libvlccore5 depends on:
ii dpkg 1.16.9
ii libc6 2.13-37
ii libdbus-1-3 1.6.8-1
ii vlc-data 2.0.3-4
Versions of packages vlc is related to:
ii libavutil50 5:0.7.11-0.1
ii libavutil51 6:0.8.4-1
-- debconf-show failed
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