Hi thanks for this detailed answer

   > For the time being (till R14.1.0 is out - possibly end of 2020) you have the following choices:

   > 1) you can mute/unmute from the KMix slider LED, this should work fine with PA already

This works but it is inconvenient since you have to fiddle with controls
   > 2) you can open KMix mixer windod -> Settings -> Configure global shortcuts and remap the "toggle mute" keyboard
   > shortcut to some other key combination. Do not use "XF86AudioMute" key, since this is normally used by KMilo and
   > therefore may not work

Thanks for this but: it does *not work*. 

I just bound it to Win+F1 for testing:
this �Toogle mute� only switches the
master but not the speaker, so it does the same as does Fn-F1

   > 3) you can create a script that calls "dcop kmix Mixer-1 toggleMasterMute", this will mute/unmute the PA master
   > channel. You can add an input action tied to a keyboard shortcut to call this easy.

The script works, nicely
   > 4) if you are on debian-like distro, you could switch to Slavek's PTB packages and get the latest R14.1.0-dev packages
   > at regular intervals. This will bring you the complete fix in a few days
does that mean Ubuntu included?

Would you mind telling me the ppa?

Thanks again

Uwe 
PS I signed this message, since you did the same, some people do
complain, though

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