[pulseaudio-tickets] [Bug 105714] New: Fast volume change (using keyboard key) causes volume difference between channels

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=105714

            Bug ID: 105714
           Summary: Fast volume change (using keyboard key) causes volume
                    difference between channels
           Product: PulseAudio
           Version: unspecified
          Hardware: All
                OS: Linux (All)
            Status: NEW
          Severity: minor
          Priority: medium
         Component: alsa
          Assignee: pulseaudio-bugs at lists.freedesktop.org
          Reporter: sylogista at sylogista.pl
        QA Contact: pulseaudio-bugs at lists.freedesktop.org
                CC: lennart at poettering.net

Created attachment 138315
  --> https://bugs.freedesktop.org/attachment.cgi?id=138315&action=edit
Screen capture with `pavucontrol` and `screenkey`.

I've custom keybind in
/etc/xdg/openbox/rc.xml
It is:

  <keybind key="XF86AudioLowerVolume">
    <action name="Execute">
      <startupnotify>
        <enabled>true</enabled>
        <name>LowerVolume</name>
      </startupnotify>
      <command>amixer -D pulse sset Master 1%-</command>
    </action>
  </keybind>

(Analogical 1%+)

In my keyboard the XF86AudioLowerVolume can be triggered by rotating keyboard's
volume control winder. And the winder is ok.

As long as I'm rotating this winder slow – everything is ok. The problem occurs
when I'm sending more than c.a. 10 XF86AudioLowerVolume "presses" per second.
(That's not so many – less than 180° rotation! That winder is standard
"infinite" rotation winder. Nothing special.)

I've prepared simple bash script that can simulate spinning of winder volume
control. For me it's working just as bad as fast winder rotation.
https://pastebin.com/hR4UCjjJ


(Take care about that I've muted STDOUT and STDERR in loop)

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