Comment # 1 on bug 1176775 from Takashi Iwai

Could you give hwinfo output taken from the latest Leap 15.2 system?
Also, run alsa-info.sh with --no-upload option, and attach the output, too.

Also, try to install the old Leap 15.1 kernel on top of your Leap 15.2 system
(it should be installable via zypper in --oldpackage option).  Leap 15.1 kernel
should still work with the rest of Leap 15.2, and if it works better, it's a
kernel regression indeed.

The latest Leap 15.1 kernel is found at
  http://download.opensuse.org/repositories/Kernel:/openSUSE-15.1/standard/
Note that this is the unofficial repo, so Secure Boot won't work.

If you manage to run Leap 15.1 kernel, please take hwinfo and alsa-info.sh
outputs from there, too.