Created attachment 706526 [details]
alsamixer screenshot

After upgrading to 42.2. "qutecom" softphone stopped working, no sound anymorem
whatever "audio setup" tried inside qutecom. Replaced by twinkle. Worked
itself, but echo on other party's side, unusable.

While narrowing down this issue regarding general VoIP settings and my VoIP
server (a German Fritzbox) it comes out, that I have a somewhat strange audio
setupm and I'm more than confused about the "interaction" of ALSA and PULSE on
my 42.2 box.

Box is a ZOTAC ZBOX nano CI320, with a builtin sound card. As I'm using a
Logitech USB headset, starting with 13.1 in 2014 was a pain regarding sound as
any application like Amarok, qutecom, kwave etc. has it's own way to select
internal sound card vs. USB headset etc. - simply a pain in the neck that time.

But as I don't use speakers, only the headset, I've decided in 2014 to DISABLE
the internal soundcard completely in BIOS, to have only the USB headset left,
to reduce complexity.

As described, worked fine (more or less :-)) until 42.2. upgrade.