[pulseaudio-discuss] [alsa-devel] softvol master has preference over virtual master in amixer

[Raymond Yau]

2012-10-21 下午4:42 於 "Takashi Iwai" <tiwai at suse.de> 寫道：
>
> At Fri, 19 Oct 2012 11:15:29 +0800,
> Raymond Yau wrote:
> >
> > does softvol plugin "master" has any preference over vmaster in amixer ?
>
> No, it shouldn't.

Simple mixer control 'Master',0 Capabilities: pvolume pswitch
pswitch-joined penum Playback channels: Front Left - Front Right Limits:
Playback 0 - 255 Mono: Front Left: Playback 255 [100%] [191.00dB] [on]
Front Right: Playback 255 [100%] [191.00dB] [on]

the dB value change to 191dB

it seem that alsa-lib is unable to find the correct tlv

>
> >
> >
http://www.alsa-project.org/db/?f=44b26f5cd37f33bfef2871ff1fd250301bdb5364
> >
> > control.32 {
> > iface MIXER
> > name 'Master Playback Volume'
> > value 64
> > comment {
> > access 'read write'
> > type INTEGER
> > count 1
> > range '0 - 64'
> > dbmin -6400
> > dbmax 0
> > dbvalue.0 0
> > }
> > }
> >
> > control.42 {
> > iface MIXER
> > name Master
> > value.0 255
> > value.1 255
> > comment {
> > access 'read write user'
> > type INTEGER
> > count 2
> > range '0 - 255'
> > tlv '0000000100000008ffffec1400000014'
> > dbmin -5100
> > dbmax 0
> > dbvalue.0 0
> > dbvalue.1 0
> > }
> >
> > Card hw:0 'Intel'/'HDA Intel at 0xfeaf8000 irq 43'
> >   Mixer name: 'Realtek ALC887-VD'
> >   Components: 'HDA:10ec0887,10438445,00100302'
> >   Controls      : 42
> >   Simple ctrls  : 22
> > Simple mixer control 'Master',0
> >   Capabilities: pvolume pswitch pswitch-joined penum
> >   Playback channels: Front Left - Front Right
> >   Limits: Playback 0 - 255
> >   Mono:
> >   Front Left: Playback 255 [100%] [191.00dB] [on]
> >   Front Right: Playback 255 [100%] [191.00dB] [on]
> > Simple mixer control 'Headphone',0
> >   Capabilities: pvolume pswitch penum
> >   Playback channels: Front Left - Front Right
> >   Limits: Playback 0 - 64
> >   Mono:
> >   Front Left: Playback 64 [100%] [0.00dB] [on]
> >   Front Right: Playback 64 [100%] [0.00dB] [on]
> > Simple mixer control 'PCM',0
> >   Capabilities: pvolume penum
> >   Playback channels: Front Left - Front Right
> >   Limits: Playback 0 - 255
> >   Mono:
> >   Front Left: Playback 255 [100%] [0.00dB]
> >   Front Right: Playback 255 [100%] [0.00dB]
> >
> > https://launchpadlibrarian.net/119782219/Symptom_PulseAudioLog.txt
> >
> > Oct 15 10:49:11 xaser pulseaudio[1601]: [pulseaudio] alsa-util.c:
Unable to
> > load mixer: Invalid argument
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