Comment # 7 on bug 1137907 from Luiz Angelo Daros de Luca

I did not test with Kernel:openSUSE-15.1 but I tested with an LivePXE 15.1 and
the problem is the same in the same machine where it happens with Tumbleweed.

As I have multiple Z440, I did multiple different tests:

# Tested with UEFI or BIOS
# Different BIOS versions
# OpenSUSE Tumbleweed, LEAP 15.1 and LEAP 15.0

What I noticed:

1) UEFI or BIOS mode does not matter.
2) It is not local confs as it happens with an Live system (using default sound
confs)
3) The same machine that always happens with Tumbleweed also always happens
with LEAP 15.1
4) It never happens with some machines.
5) The machine where is always happens uses (amdgpu) AMD VGA (and has an HDMI
HDA audio)
5) The machine where is never happens uses (nouveau) Nvidia VGA (and has an
HDMI HDA audio device)

Those machines that the problem does not happens, some of them still have a
problem with "pacmd list" information. Sometimes, "pacmd list" does not update
with jack events but it gets updated when device is actually used
(aplay/arecord). I can confirm that with other PA clients like KDE sound
settings.

Maybe both "only detect jack changes when device is used" and "never detects
jack changes" have the same origin. It might be something wrong with what
BIOS/UEFI sent. Or, it might be related to HDMI.