[pulseaudio-discuss] [ANNOUNCE] PulseAudio 7.1 released
superquad.vortex2 at gmail.com
Thu Nov 5 08:49:07 PST 2015
> > http://pastebin.com/1fNAViKp
> PulseAudio finds only the headphone path based on the information that
> the kernel gives. The card doesn't seem to have a separate headphone
> jack itself, so I suppose the "Headphone" mixer element controls the
> front panel output volume, if you have such thing hooked to the card.
> I think the kernel should create a jack element for the back panel
> output (at least a phantom jack, if proper jack detection can't be
> implemented). That would allow PulseAudio to distinguish between the
> back and front panel outputs. As a workaround, I think removing the
> contents of /usr/share/pulseaudio/alsa-mixer/paths/analog-output-
> headphones.conf would make the volume control work again (just delete
> the contents, not the file itself).
> The reason why this worked before version 7.1 is that your "Master"
> volume element has more than 2 channels, which PulseAudio couldn't
> handle, so the headphone path (which includes the "Master" element) was
> disabled. PulseAudio still can't handle volume elements with more than
> 2 channels, but as of 7.1, such elements are just ignored, so they
> don't disable the whole path.
>  https://www.asus.com/Sound-Cards/Xonar_DS/specifications/
It seem that there is a bug in alsa mixer api which combine volume and mute
switch with different number of channels (items) but the mixer api assume
both controls have same number of channels(items)
name 'Master Playback Volume'
access 'read write'
range '67 - 127'
name 'Master Playback Switch'
access 'read write'
Simple mixer control 'Master',0
Capabilities: pvolume pswitch pswitch-joined
Playback channels: Front Left - Front Right - Rear Left - Rear Right -
Front Center - Woofer - Side Left - Side Right
Limits: Playback 67 - 127
Front Left: Playback 121 [90%] [-6.00dB] [on]
Front Right: Playback 121 [90%] [-6.00dB] [on]
Rear Left: Playback 121 [90%] [-6.00dB] [on]
Rear Right: Playback 121 [90%] [-6.00dB] [on]
Front Center: Playback 121 [90%] [-6.00dB] [on]
Woofer: Playback 94 [45%] [-33.00dB] [on]
Side Left: Playback 121 [90%] [-6.00dB] [on]
Side Right: Playback 121 [90%] [-6.00dB] [on]
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