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The patch posted in comment #8 is unrelated to the original problem
(changing front affects rear volume).
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https://bugs.launchpad.net/bugs/832184
Title:
[SB Live! Value [CT4832]]
It seem that pulseaudio mute the other switches (e.g. PCM and Surround) when
you mute Master Playback Volume of ac97 codec using any alsa application
(e.g. amixer, alsamixer, qasmixer, gnome-alsamixer) if your sound card with
ac97 codec is set as default sound card in ubuntu 12.04
~$ amixer
http://git.alsa-project.org/?p=alsa-
kernel.git;a=blob_plain;f=Documentation/sound/alsa/SB-Live-mixer.txt
Some SB Live have I2S DAC which does not has any volume control, the driver use
the FX-bus accumulators
Wave , Wave Surround playback volume control seem affect stream
using hw device
The attachment kepp PCM Playback Switch Unmute when application mute
Master Playback Switch of ac97 codec of this bug report has been
identified as being a patch. The ubuntu-reviewers team has been
subscribed to the bug report so that they can review the patch. In the
event that this is in fact
** Summary changed:
- Changing front output volume affects rear output volume
+ [SB Live! Value [CT4832]] Changing front output volume affects rear output
volume
** Package changed: pulseaudio (Ubuntu) = alsa-driver (Ubuntu)
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If I remove pulseaudio and use it by alsa only, Master track and PCM
track control the volume of the front output, and Wave Surround controls
the volume of the rear output and the digital output. It works fine that
way.
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Hmm, Wave Surround is definitely a non-standard volume control name.
You can workaround this for yourself by editing /usr/share/pulseaudio
/alsa-mixer/paths/analog-output.conf (or whatever port you want to use),
and change e g [Element Surround] to [Element Wave Surround].
I'm not familiar enough
We probably want to deal with these as we do for other Creative cards with
similar element names, e.g., Wave Front. They're similar to their
counterparts without Wave.
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** Description changed:
Now that all the outputs are supported (see bug 560178), there is still
something wrong with the mixer elements.
In Analog Surround 4.0 Output + Analog Stereo Input mode (where fortunately
also digital output is enabled; I don't know about the digital input)
There exist [Element Rear] and [Element Surround] that have identical settings
in /usr/share/pulseaudio/alsa-mixer/paths/analog-output.conf:
switch = mute
volume = merge
override-map.1 = all-rear
override-map.2 = rear-left,rear-right
I don't think this bug is in alsa-driver.
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