Comment # 2 on bug 1173085 from Takashi Iwai

Do you still have Leap 15.1 system or kernel on your machine?  If not, could
you try to install Leap 15.1 kernel on top of your 15.2 system with zypper in
--oldpackage option and check whether the device shows up properly?
We need some direct comparison of kernels while keeping the rest, to exclude
other possibilities.

If Leap 15.1 kernel really works, please upload dmesg output and hwinfo from
from there.