https://bugs.kde.org/show_bug.cgi?id=428757

--- Comment #9 from Pedro V <voidpointertonull+bugskde...@gmail.com> ---
(In reply to Andrea Ippolito from comment #7)
> I managed to reproduce this issue when connecting a pair of Bluetooth
> earbuds.
> 
> https://youtu.be/SWWRHmtfQLI

Aside from hitting bug 489083 , it's really odd to see the issue happening with
a single audio source which may not be even the originally described bug.

(In reply to Andrea Ippolito from comment #7)
> In my video I'm toggling mic off/on with Meta+volume mute (which is Fn + F3
> on my keyboard)

Beware, that's covered by bug 435142 , the shortcut and the applet work
differently!


(In reply to Andrea Ippolito from comment #8)
> It's very confusing and makes me not use this feature at all because I'm
> always worried that my mic might not be actually muted.

It's definitely a concern, especially as I've seen the tray icon no longer
following changes after high system load, even though the popup still confirmed
toggles. It's been a while though since I've seen that, not sure if it can
still happen.

But even though I'd also like to use it as a kind of security feature, it
really isn't one:
- Monitoring just the default audio source inherently makes the indication
vulnerable to changes. No need for malicious intentions, EasyEffects source
becoming the default audio source already defeats the whole idea of using the
indicator to figure if programs can record the microphone.
- Completely outside of its scope, but apparently muting isn't really
guaranteed to work. Used EasyEffects a bit, but effectively couldn't mute it,
even though pactl also confirmed the mute status being set properly. That was
quite a killer combination with the indicator only focusing on the default
device which was the mute immune EasyEffects source.
- Programs can unmute the microphone. Sure, well-behaved programs are not
expected to do so, but for example some multiplayer games are well-known to
like to fiddle with microphone settings, and them also happening to be
fullscreen most of the time can perfectly hide status changes.

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