Hi alsamixer offers no mute knob on the master channel with kernel 3.2.6, see below.
┌──────────────────────────── AlsaMixer v1.0.24.2 ─────────────────────────────┐ │ Card: HDA Intel F1: Help │ │ Chip: Conexant CX20561 (Hermosa) F2: System information │ │ View: F3:[Playback] F4: Capture F5: All F6: Select sound card │ │ Item: Master [dB gain: -12.00] Esc: Exit │ │ │ │ ┌──┐ ┌──┐ ┌──┐ ┌──┐ ┌──┐ ┌──┐ ┌──┐ │ │ │ │ │▒▒│ │▒▒│ │▒▒│ │ │ │ │ │ │ │ │ │ │ │▒▒│ │▒▒│ │▒▒│ │ │ │ │ │ │ │ │ │ │ │▒▒│ │▒▒│ │▒▒│ │ │ │ │ │ │ > │ │ │ │▒▒│ │▒▒│ │▒▒│ │ │ │ │ │ │ > │ │▒▒│ │▒▒│ │▒▒│ │▒▒│ │ │ │ │ │ │ > │ │▒▒│ │▒▒│ │▒▒│ │▒▒│ │ │ │ │ │ │ > │ │▒▒│ │▒▒│ │▒▒│ │▒▒│ │ │ │ │ │ │ > │ │▒▒│ │▒▒│ │▒▒│ │▒▒│ │ │ │ │ │ │ > │ │▒▒│ │▒▒│ │▒▒│ │▒▒│ │ │ │ │ │ │ > │ │▒▒│ │▒▒│ │▒▒│ │▒▒│ │ │ │ │ │ │ │ │ │▒▒│ │▒▒│ │▒▒│ │▒▒│ │ │ │ │ │ │ │ │ └──┘ └──┘ └──┘ └──┘ └──┘ ├──┤ Enabled └──┘ │ │ │OO│ │ │ └──┘ │ │ 61 100<>100 100<>100 100<>100 0<>0 0 0<>0 │ │ < Master >Headphon Speaker PCM Mic Boos Beep Auto-Mut Dock Mic │ └──────────────────────────────────────────────────────────────────────────────┘ With kernel 3.1.8 there is a mute knob on the master channel. ┌──────────────────────────── AlsaMixer v1.0.24.2 ─────────────────────────────┐ │ Card: HDA Intel F1: Help │ │ Chip: Conexant CX20561 (Hermosa) F2: System information │ │ View: F3:[Playback] F4: Capture F5: All F6: Select sound card │ │ Item: Master [dB gain: -11.00, -11.00] Esc: Exit │ │ │ │ ┌──┐ ┌──┐ ┌──┐ ┌──┐ ┌──┐ ┌──┐ │ │ │ │ │▒▒│ │ │ │ │ │ │ │▒▒│ │ │ │ │ │▒▒│ │ │ │ │ │ │ │▒▒│ │ │ │ │ │▒▒│ │ │ │ │ │ │ │▒▒│ │ │ │ │ │▒▒│ │ │ │ │ │ │ │▒▒│ │ │ │▒▒│ │▒▒│ │ │ │ │ │▒▒│ │▒▒│ │ │ │▒▒│ │▒▒│ │ │ │ │ │▒▒│ │▒▒│ │ │ │▒▒│ │▒▒│ │ │ │ │ │▒▒│ │▒▒│ │ │ │▒▒│ │▒▒│ │ │ │ │ │▒▒│ │▒▒│ │ │ │▒▒│ │▒▒│ │ │ │ │ │▒▒│ │▒▒│ │ │ │▒▒│ │▒▒│ │ │ │ │ │▒▒│ │▒▒│ │ │ │▒▒│ │▒▒│ │ │ │ │ │▒▒│ │▒▒│ │ │ ├──┤ └──┘ ├──┤ ┌──┐ ┌──┐ ├──┤ ├──┤ ├──┤ │ │ │MM│ │MM│ │OO│ │OO│ │OO│ │OO│ │OO│ │ │ └──┘ └──┘ └──┘ └──┘ └──┘ └──┘ └──┘ │ │ 63<>63 100<>100 0<>0 0 61<>61 100<>100 │ │ < Master > PCM Mic S/PDIF S/PDIF D Beep Docking Internal │ └──────────────────────────────────────────────────────────────────────────────┘ So I don't see how to reproduce things with alsamixer. How to proceed? Thank you for your patience Sven Am Donnerstag, den 23.02.2012, 16:52 -0600 schrieb Jonathan Nieder: > S. G. wrote: > > > please find attached the requested outputs. > > Thanks. > > I do not know pulseaudio well, so one more question. Can you reproduce > this without using pulseaudio? Like so (in a "pasuspender bash" session): > > alsamixer -c0 > ... fiddle with "mute" knob, which seems to bound to the 'M' key ... > aplay <some sound file> > > If so, please report this at http://bugzilla.kernel.org/, product Drivers, > component Sound (ALSA), and let us know the bug number so we can track > it. Be sure to include: > > - steps to reproduce (ideally not requiring pulseaudio), expected result, > actual result, and how the difference indicates a bug > - which kernel versions you have tested and results with each > - full "dmesg" output from an affected kernel, as an attachment > - pointers for where to get relevant alsa-info.sh output (or you can > attach them separately, too) > - which outputs are affected, and whether results change when > headphones are plugged in > - what kind of tests you'd be able to perform to track this down (e.g., > if someone provides a debugging patch, can you test it? Can you bisect?) > - any other weird symptoms or observations > > If it is not reproducible without pulseaudio, we can get help from the > pulseaudio maintainers, so that's fine, too. > > Sorry for the fuss, and hope that helps, > Jonathan >
