[pulseaudio-tickets] [Bug 92207] Disabling flat volumes triggered master volume level to reach 100% while trying to decrease/increase it

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=92207

--- Comment #6 from Germano Massullo  ---
(In reply to Raymond from comment #5)
> https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/commit/sound/
> pci/oxygen?id=eacbb9dba6b4c982a0217ea2c7d15db88d4fda37

Mmmh I don't understand how this change in source code may be related to this
bugreport...
Actually I am using Fedora 24,
kmix-16.04.2-1.fc24.x86_64
pulseaudio-8.0-6.fc24.x86_6
and I can say that since F23 I have never experienced this bug again. By the
way I am still worried about long term distros, like RHEL/CentOS (etc.), that
use more ancient packages.

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[pulseaudio-tickets] [Bug 92207] Disabling flat volumes triggered master volume level to reach 100% while trying to decrease/increase it

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=92207

--- Comment #2 from Raymond  ---
https://bugs.freedesktop.org/show_bug.cgi?id=84983

pulseaudio drop support of multi channel volume control

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[pulseaudio-tickets] [Bug 92207] Disabling flat volumes triggered master volume level to reach 100% while trying to decrease/increase it

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=92207

--- Comment #4 from Raymond  ---
 [pulseaudio] alsa-mixer.c: Available mixer paths (after tidying):
D: [pulseaudio] alsa-mixer.c: Path Set 0x559ae9bf8c10, direction=1
D: [pulseaudio] alsa-mixer.c: Path analog-output (Uscita analogica),
direction=1, priority=99, probed=yes, supported=yes, has_mute=yes,
has_volume=yes, has_dB=yes, min_volume=135, max_volume=255, min_dB=-60,
max_dB=0
D: [pulseaudio] alsa-mixer.c: Element Master, direction=1, switch=1, volume=1,
volume_limit=-1, enumeration=0, required=0, required_any=0, required_absent=0,
mask=0x36f66, n_channels=2, override_map=yes



min dB -60dB is at 135 and  0 dB is at 255 

number of step is 120


how do  kmix/pulseudio calulate percentage ?

volume step - min step / (max step - min step)

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[pulseaudio-tickets] [Bug 92207] Disabling flat volumes triggered master volume level to reach 100% while trying to decrease/increase it

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=92207

--- Comment #1 from Tanu Kaskinen  ---
In the first occurrence you didn't notice that the 70% volume was output
volume, while the 100% volume was microphone volume.

The second occurrence shows a real jump, however (lines 18014-18015):

D: [pulseaudio] protocol-native.c: Client kmix changes volume of sink
alsa_output.pci-_08_06.0.analog-stereo.
D: [pulseaudio] sink.c: The reference volume of sink
alsa_output.pci-_08_06.0.analog-stereo changed from front-left: 26208 / 
40% / -23,88 dB,   front-right: 26208 /  40% / -23,88 dB to front-left: 65536 /
100% / 0,00 dB,   front-right: 65536 / 100% / 0,00 dB.

The log looks like kmix sets the 100%, but of course it may be that PulseAudio
is misinterpreting the data that kmix sends. One way to debug this would be to
modify pa_context_set_sink_volume_by_index() so that it logs at the client side
the parameters that kmix gives.

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