Bug#909207: pavucontrol: Pavucontrol don't see all the sound cards

[Stefano Simonucci]

Package: pavucontrol
Version: 3.0-4
Severity: important

Dear Maintainer,
    I have in my computer two Audio boards:
    $ lspci | grep -e Audio
00:1b.0 Audio device: Intel Corporation 9 Series Chipset Family HD Audio Controller
01:00.1 Audio device: NVIDIA Corporation Device 0fbc (rev a1)

but I have able to use only the Nvidia audio device which don't have an input device, so I'm not able to use skypeforlinux. Nevertheless the Intel Chipset is seen by audacity or by the alsa mixer, so that I'm able to use the microphone for the registration. I have used mate desktop and the gnome-desktop with the same result. 
Pavucontrol sees one sound card: Nvidia card. I don't understand the reason for this.
Thank you in advance
Stefano

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-- System Information:
Debian Release: buster/sid
  APT prefers testing
  APT policy: (500, 'testing'), (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.16.0-1-amd64 (SMP w/8 CPU cores)
Locale: LANG=it_IT.utf8, LC_CTYPE=it_IT.utf8 (charmap=UTF-8), LANGUAGE=it_IT.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages pavucontrol depends on:
ii  libatk1.0-0              2.28.1-1
ii  libatkmm-1.6-1v5         2.24.2-3
ii  libc6                    2.27-6
ii  libcairo-gobject2        1.15.12-1
ii  libcairo2                1.15.12-1
ii  libcairomm-1.0-1v5       1.12.2-3
ii  libcanberra-gtk3-0       0.30-6
ii  libcanberra0             0.30-6
ii  libgcc1                  1:8.2.0-6
ii  libgdk-pixbuf2.0-0       2.36.12-2
ii  libglib2.0-0             2.56.1-2
ii  libglibmm-2.4-1v5        2.56.0-2
ii  libgtk-3-0               3.22.30-2
ii  libgtkmm-3.0-1v5         3.22.2-2
ii  libpango-1.0-0           1.42.4-1
ii  libpangocairo-1.0-0      1.42.4-1
ii  libpangomm-1.4-1v5       2.40.1-4
ii  libpulse-mainloop-glib0  12.2-2
ii  libpulse0                12.2-2
ii  libsigc++-2.0-0v5        2.10.0-2.1
ii  libstdc++6               8.2.0-6
ii  libx11-6                 2:1.6.6-1

Versions of packages pavucontrol recommends:
ii  pulseaudio  12.2-2

pavucontrol suggests no packages.

-- no debconf information