Bug#786750: pavucontrol: supertuxkart can't change output device

[radiodurans]

Package: pavucontrol
Version: 3.0-4
Followup-For: Bug #786750

Dear Maintainer,

*** Reporter, please consider answering these questions, where appropriate ***

   * What led up to the situation?
     
     Playing supertuxkart with an attached USB DAC

   * What exactly did you do (or not do) that was effective (or
     ineffective)?

     I opened Pulse audio control to changed from Built-In Audio to my DAC.
     Clicking on the Built-in audio to change to the DAC, I could select
     the DAC not with mouse, but by hitting space.

     I also tried a suggestion from pulseaudio freenode channel: 
     https://askubuntu.com/questions/433459/move-audio-stream-from-openal-application-to-different-audio-device
 
     Basically, it was to add a ~/.alsoftrc file with allow-moves = true

   * What was the outcome of this action?

     Upon hitting enter with the DAC select, it reverted back to built-in
     audio for the stream

     Adding the "allow-moves = true"  and restarting also did nothing

   * What outcome did you expect instead?

     DAC setting to be set and audio to start streaming to the DAC -- neither
     happened


-- System Information:
Debian Release: 10.0
  APT prefers stable
  APT policy: (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 4.19.0-5-amd64 (SMP w/4 CPU cores)
Kernel taint flags: TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages pavucontrol depends on:
ii  libatk1.0-0              2.30.0-2
ii  libatkmm-1.6-1v5         2.28.0-2
ii  libc6                    2.28-10
ii  libcairo-gobject2        1.16.0-4
ii  libcairo2                1.16.0-4
ii  libcairomm-1.0-1v5       1.12.2-4
ii  libcanberra-gtk3-0       0.30-7
ii  libcanberra0             0.30-7
ii  libgcc1                  1:8.3.0-6
ii  libgdk-pixbuf2.0-0       2.38.1+dfsg-1
ii  libglib2.0-0             2.58.3-2
ii  libglibmm-2.4-1v5        2.58.0-2
ii  libgtk-3-0               3.24.5-1
ii  libgtkmm-3.0-1v5         3.24.0-2
ii  libpango-1.0-0           1.42.4-7~deb10u1
ii  libpangocairo-1.0-0      1.42.4-7~deb10u1
ii  libpangomm-1.4-1v5       2.42.0-2
ii  libpulse-mainloop-glib0  12.2-4
ii  libpulse0                12.2-4
ii  libsigc++-2.0-0v5        2.10.1-2
ii  libstdc++6               8.3.0-6
ii  libx11-6                 2:1.6.7-1

Versions of packages pavucontrol recommends:
ii  pulseaudio  12.2-4

pavucontrol suggests no packages.

-- no debconf information